Patent Law Blog (Patently-O)

Diverging Claim Constructions

Yesterday raised a valuable discussion on claim construction with many excellent comments on the Cotropia-Bey article. The issue is obviously important since claim construction disputes arise in virtually every attempt to enforce a patent. One problem with claim construction in litigation is that the district court follows a completely different process of claim construction than do PTO examiners. The rules suggest that the two claim construction scopes should form concentric circles with the PTO's broad construction and the Court's narrower construction. The reality is that it is hard to form these concentric circles -- especially with complex claims. And, it is virtually impossible to form concentric circles of construction using such distinct construction processes. Instead of nested constructions, in many cases the outcome of the district court tends to diverge from that suggested during prosecution.   

It seems odd that the patent prosecution process does not focus on determining the correct meaning of the claims. The better approach may well be to allow the original examination to determine the correct meaning of claims in a way that can be followed by courts down the line. I suspect that this approach would actually lead to more valid patents -- especially if examiners applied a stronger hand on issues of indefiniteness.

Notes:

• Joel Miller's 2006 JPTOS article in the Broadest Reasonable Interpretation standard is available here.
• Mark Lemley and Dan Burke recently wrote a paper arguing that we should admit defeat and move to a central claiming system. Their analogy is that claims might be better used as sign-posts rather than fence-posts. [Link]
• Lemley's 2005 article on The Changing Meaning of Patent Claim Terms is also a good read. [Link]

The Unreasonableness of the Patent Office's 'Broadest Reasonable Interpretation' Standard

Chris Cotropia (Richmond Law) and Dawn-Marie Bey (King & Spalding) have an interesting draft article out on the PTO's "broadest reasonable interpretation" standard for interpreting claims during patent prosecution. The article notes that the increase in post-grant reviews (reexaminations) running concurrently with infringement litigation raises the stakes of the PTO's standard.

From the abstract:

Although there has been much commentary on patent claim interpretation methodology in general, very little has been written about the unique interpretation approach the Patent Office employs. The courts, starting with the Court of Customs and Patent Appeals and continuing with the Federal Circuit, instruct the Patent Office to give every applied-for claim its 'broadest reasonable interpretation' (BRI) during patent examination. This Article explores this special standard and concludes that not only are the previously articulated rationales behind the BRI standard severely lacking, the standard is also contrary to both the patent statutes and the concept of a unitary patent system. The BRI standard additionally allows patent examiners to avoid difficult claim interpretation issues, leads to improper and uncorrectable denials of patent protection, and is incurably ambiguous.

Notes:

• Read the article here.
• MPEP 2111 "CLAIMS MUST BE GIVEN THEIR BROADEST REASONABLE INTERPRETATION"
• Ex parte Koo (BPAI 2008) (PTO Should Apply Broadest Reasonable Claim Interpretation to Section 101 Analysis)

When The Infringing Device only Temporarily Meets the Claim Limitations

Gemtron v. Saint-Gobain (Fed. Cir. 2009)

The Michigan-based district court found that Saint-Gobain’s refrigerator shelves infringe Gemtron’s patent No. 6,679,573 and awarded a permanent injunction against further infringement. The shelves were unique – primarily because the glass panel shelf securly snaps into its plastic frame rather than being held by adhesives. The claims required the plastic fram to be “relatively resiliant” so that the glass could snap into place.

The claim construction issue was interesting because it focused on timing. Saint-Gobain’s plastic frame was resiliant while still warm immediately after forming. However, it quickly hardened and became brittle afterward. The accused infringer argued that the limitation “‘relatively resilient’ should not mean ‘temporarily resilient immediately after cooking in an oven and before any opportunity to cool.’”

On appeal, the Federal Circuit affirmed – finding that the purpose of the resiliance (to install the glass panel) “suggests that the claimed resilience of the frame need only be exhibited during assembly.”

There is no discussion in the specification of any purpose for or value of the “relatively resilient” structural characteristic …, other than to facilitate assembly of the shelf. This indicates that the end edge portions of the frame have the claimed structural characteristic—“relatively resilient”—if they are able to deflect at the time the shelf is assembled, to “snap-secure” the glass panel within the frame.

Affirmed.

• Note: The permanent injunction was affirmed without comment.

Fractured Claim Construction

Agilent Tech., Inc. v. Affymetrix, Inc. (Fed. Cir. 2009)

Agilent's microarray hybridization genetic analysis patent issued in 2003. After seeing those issued claims, Affymetrix amended a pending application by adding identical claims in order to provoke an interference. The Agilent patent has a priority date of 1998 while the Affymetrix application claims priority back to 1995. The Board of Patent Appeals and Interferences (BPAI) awarded priority to Affymetrix in 2006. That holding was upheld by a N.D. California district court in 2008.

Here, the Federal Circuit reverses - holding that Affymetrix cannot claim priority back to its 1995 filing because that original application "does not satisfy the written description requirement for the claims at issue." Written description is particularly relevant in interference cases where one party typically copies claims from another patent document.

Claim Construction in an Interference: Several articles have been written on the complicated and ever-changing scope of a patent claim. At the PTO, claims are usually given their broadest reasonable meaning while in litigation, courts look for how a PHOSITA would interpret the scope, etc.. Phillips teaches that proper claim construction looks at the literal language of the claims as well as supporting information from the specification and prosecution history. In an interference, however, the copied claims originally came from another application.

Faced with a split of precedent, the Federal Circuit here decided to continue with multiple interpretations of an individual claim. Following Spina, the court holds that - for the purposes of the written description requirement - the newly added claims should be interpreted based on the specification and history of the opposing source application. However, following Rowe, the Federal Circuit held that for the purposes of novelty and nonobviousness, the newly added claims should be construed based on the specification and history of the amended application.

To be clear, as this court explained in Rowe, when a party challenges written description support for an interference count or the copied claim in an interference, the originating disclosure provides the meaning of the pertinent claim language. When a party challenges a claim’s validity under § 102 or § 103, however, this court and the Board must interpret the claim in light of the specification in which it appears.

This change in primary interpretative materials allowed the Federal Circuit to also change the claim construction and consequently hold that Affymetrix's application "does not satisfy the written description requirement for the claims at issue."

Notes:

• As a pending application, Affymetrix's claims had no presumption of validity. "Thus, Agilent’s burden of proving a lack of written description in Affymetrix’s Besemer application is a simple preponderance of the evidence. Eli Lilly & Co. v. Aradigm Corp., 376 F.3d 1352, 1365 (Fed. Cir. 2004)."   

Paragon v. Timex: Claims with Contextual Limitations

Paragon Solutions v. Timex (Fed. Cir. 2009)

Paragon's patent covers a GPS/physiologic exercise monitoring system that displays realtime calculated values such as heartrate, altitude, velocity. The components of the invention are divided between a data acquisition unit and a display unit. After an unfavorable claim construction, Paragon stipulated to a non-infringement judgment. On appeal, the Federal Circuit vacated judgment - finding that the district court had improperly construed the terms.

Disavowal of Claim Scope : The district court concluded that the claimed "data acquisition unit" must be a single structure encompassing both GPS and physiologic sensors. That ruling was critical because the accused device (Timex Biolink) physically separates the GPS and physiologic monitors. Although the claim language did not limit the acquisition unit to a single physical device, the district court found that Paragon had disavowed that scope

when it amended the claims to require that the acquisition unit be separate from the display unit.

On appeal, the Federal Circuit agreed that the patentee had clearly disavowed a single structure. However the court could not find a reason that the amendment would limit the acquisition unit to a single device.

We conclude that, read in light of the specification, the claim term “data

acquisition unit” is not limited to a single structure but may comprise multiple physically separate str

uctures, and that the applicants did not make a clear and unmistakable disavowal of multiple physically separate structures during prosecution.

Parallel Construction: In construing claims, courts presume that a term in one claim will hold its meaning throughout the claims. That presumption is overcome when "it is clear from the specification and prosecution history that the terms have different meanings at different portions of the claims." Here, because the claimed "acquisition unit" can be multiple structures, the Federal Circuit found that the claimed "display unit" may also include multiple structures.

Real Time Data: The district court interpreted the claimed "real time" display of data as contextual. For some activities - such as mountain climbing - a thirty second delay may well be "real time." However, for ot

her activities, a thirty second delay would not be considered real time.

On appeal, the Federal Circuit held that this context-dependent definition is not proper in an apparatus claim. “[A]pparatus claims cover what a device is, not what a device does.” Hewlett-Packard v. Bausch & Lomb, 909 F.2d 1464, 1468 (Fed. Cir. 1990).

Absent an express limitation to the contrary, any use of a device that meets all of the limitations of an apparatus claim written in structural terms infringes that apparatus claim. ... Construing a non-functional term in an apparatus claim in a way that makes direct infringement turn on the use to which an accused apparatus is later put confuses rather than clarifies, frustrates the ability of both the patentee and potential infringers to ascertain the propriety of particular activities, and is inconsistent with the notice function central to the patent system.

Consequently, the Federal Circuit modified the construction of “displaying real-time data,” to be “displaying data without intentional delay, given the processing limitations of the system and the time required to accurately measure the data.”

Based on these modifications to the claim construction, the Federal Circuit vacated the finding of non-infringement and remanded for further proceedings. I wonder -- if the specification had clearly indicated that the definition of "real-time" could shift depending on the type of use, would the claim then be held invalid as indefinite under 35 USC 112.

Notes:

• This case could potentially have an impact on pharmaceutical composition claims that include limitations such as "a physiologically sufficient amount." Of course, whether a drug is "physiological sufficient" will often depend upon the individual patient and that patient's particular situation at that time.
• There are two major difference between the Paragon situation and my hypothetical compound claim. First, the real-time display capability in Paragon was seen as a structural limitation while the "physiologically sufficient" amount could be seen as a functional limitation. This difference is important because the Federal Circuit expressly limited its holding to the construction of "non-functional term[s]." However, that distinction is slight because it is unclear what the court meant by "non-functional." (I.e., "a non-functional term" could be a purely aesthetic limitation; it could be a means-plus-function term; it could be a term that defines the purpose of a particular structure; etc.) A second distinction is that Paragon's claim is an apparatus claim not a compound claim. Neither of these distinctions appear compelling.

Deference to ITC Claim Construction Decisions?

Erbe Elektromedizin v. ITC and Canady Tech (Fed. Cir. 2009) 08-1358.pdf

Erbe's patent appears to cover aspects of a surgical flesh-welding technique known as argon plasma coagulation (APC). After narrowly construing the claimed plurality of endoscopic “working channel," the ITC found no evidence of direct infringement. On appeal, the Federal Circuit affirmed.

I'll avoid the claim construction particulars, but focus here on whether the Federal Circuit can properly review ITC Claim Construction decisions de novo.

Claim construction is a matter of law, and under the Administrative Procedures Act, the Federal Circuit reviews ITC decisions of law for "correctness." However, in the usual course, agency decisions interpreting a matter of law are ordinarily given at least Skidmore level deference. See Christensen v. Harris County.

Federal Circuit Applies Phillips to Limit Gift Card Claim Construction

Every Penny Counts, Inc. v. American Express, Visa, Green Dot, MasterCard, First Data, etc. (Federal Circuit 2009)

Dr. Burke is a psychoanalyst who never liked change. I'm not talking Obama style change. No, Burke patented a method for donating leftover change ("excess cash") to charities (or to store it in a separate savings account.)

Burke's company (EPC) sued a host of defendants. who sell gift cards -- alleging that the retail sale of gift cards along with merchandise infringe upon his patents because the gift card sales “loading value onto accounts at a point-of-sale terminal.” EPC's argument was that the purchaser was using "excess cash" to buy the gift card.

On appeal, the Federal Circuit rejected the patentee's argument for a broad claim construction - instead holding that the claimed "excess cash" was an “amount selected by the payor beyond the total amount due at the point of sale.”

Looking at the specification as “the primary basis for construing the claims,” the appellate panel noted that the specification repeatedly described the method's purpose as allowing someone to conveniently donate to charities or to painlessly save money. From the specification:

In current shopping situations a clerk inputs the price of all items in a cash register and the latter totals the price. The consumer offers either the exact amount of cash or a sum exceeding the price, and the clerk enters that amount. The cash register then subtracts the price from the cash.

The excess cash offers the customers an opportunity to save small amounts of money painlessly. It also affords the consumer to donate [sic] small amounts of money to charity.

Interpreting this, the Federal Circuit determined that the claimed "excess cash" must be only what is left over after all items (including gift cards) are paid for. "Where the consumer does not offer a sum in excess of the total displayed on the cash register, then there is no excess cash."

Non-infringement affirmed.

Notes:

• Read the Opinion: 08-1434.pdf.
• The Federal Circuit remarked that EPC wasted its appellate time arguing process - that it didn't get a fair chance to argue claim-construction below. Claim construction is reviewed de novo, and the appellant needs to focus on why it should win on the merits, not on whether the district court was listening. "EPC has surprisingly little to say about what it alleges is substantively wrong with the district court’s construction, or why its proposed construction would be better on the merits. Instead, it attempts to assign error to the district court’s construction on a number of procedural grounds. Principally, it argues that the court erred by (1) spending a portion of the claim construction hearing considering the meaning of the phrase “sales price,” which was not a disputed claim term; and (2) using the accused products to tailor a construction of the patent claims that would make it impossible for EPC to prove infringement. Neither of these arguments has merit."
• As a rule, the Federal Circuit is respectful to both parties as well as their arguments and positions. Here, Senior Judge Cudahy went about as far as the Court ever does by describing Burke's invention only within quotation marks (Burke's "invention") and once referring to the "'invention', such as it is." The court more explicitly showed its disdain by awarding costs to the defendants.
• Some of you may have heard of Bank of America's "Keep the Change" program. According to the company brochure: "Each time you buy something with your Bank of America Check Card, we'll round your purchase to the nearest dollar amount and transfer the difference from your checking account to your savings account. You get to keep the change and grow your savings. What could be easier?" EPC's litigation against BOA continues.

Looking Ahead: Preclusive Effect of Prior Claim Construction

Shire v. Sandoz, M-893 (Fed. Cir. 2009)

In a recent order, the Federal Circuit agreed to hear an interlocutory appeal considering the issue preclusive effect of a prior claim construction decision. The patent in suit has been construed at least twice before, but the lower court here "refused to give preclusive effect" to either prior ruling. This will be an interesting case to follow.

2009-M893.2-6-09.1.PDF

Federal Split Decision Highlights Unpredictability of Claim Construction (Once Again)

Kinetic Concepts v. Blue Sky Medical Group (Fed. Cir. 2009)

Virtually every theory or defense in patent law requires claim construction before coming to a final conclusion. This case focused on obviousness and considered how the results turn on the construction of the claim term "treating a wound." A two-member majority (Judges Prost and Bryson) narrowly construed the term to only include treatment of surface wounds (instead of internal organs) and affirmed a nonobviousness holding. The dissent (Judge Dyk) saw a broader definition leading him to a conclusion that the claims were obvious in light of the prior art.

Hal Wegner aptly notes that it would be "difficult without an intensive study of the record to determine whether the majority or the dissent has properly construed the claims under Federal Circuit precedent: Indeed, it is possible that both constructions are acceptable. Kinetic Concepts thus once again points to the continued imperative of statutory claim construction reform."

As per usual, Judge Dyk's dissent is sharp - finding that the majority erred first by finding that the term should be limited to the disclosed embodiments and erred again by narrowly misreading the scope of the disclosed embodiments:

"In my view, the majority improperly holds that the claim term “wound” can be limited to the disclosed embodiments in the specification, and, having done so, then misreads the specification as showing only embodiments treating harm to the surface of the body or skin wounds. Under the correct construction of this claim term, the asserted claims of U.S. Patent Nos. 5,636,643 (“’643 Patent”) and 5,645,081 (“’081 Patent”) would have been obvious."

Notes: Read the decision 07-1340.pdf.

Supreme Court Patent Update

Completed Cases: The Supreme Court has denied certiorari of two pending appeals: BPMC v. California and Rattler Tools v. Bilco. In BPMC, the patentee had challenged the Western state’s defense of sovereign immunity. In Rattler Tools, the appeal challenged a non-precedential claim construction opinion.

Upcoming Case: In a recently filed petition, 800 Adept has asked the Supreme Court to build on its 1995 Markman decision and consider “whether a district judge’s construction of a patent claim is ever entitled to deference upon appellate review, or, instead, are all such claim constructions reviewable only de novo, as the Federal Circuit has, over many dissenting opinions, held?” In this case, the Federal Circuit had reversed the lower court’s claim construction and – as a consequence – also reversed the jury verdict of infringement. [Link]. FTC v. Rambus is the most likely candidate of patent cases in the petition stage. That case involves the activities of a patentee during a standard setting process. In a related case, well respected Federal Judge Sue Robinson held that Rambus could not enforce twelve of its patents against Micron as a penalty for litigation misconduct. [Link]

Muddling Through Claim Construction

Vehicle IP v. General Motors Corp. and OnStar (Fed. Cir. 2009)(Nonprecedential)

VIP's patent covers a vehicle navigation system. After construing the asserted claims, the W.D. Wisc. court granted summary judgment of non-infringement. This appeal focuses on construction of the phrase "a notification region defined by a plurality of notification coordinates."

The infringing systems use scalars – such as a distance – and the debate is whether those scalars fit the claimed "coordinates" limitation. The majority opinion (Prost & Bryson, JJ) held that the "plain language of the claims precludes the possibility that a coordinate can be a scalar." According to the claim, the location of the device must "substantially corresponds to a notification coordinate," and a bare distance does not correlate to a location. The majority also found suggestions in the prosecution history supporting a narrow construction of coordinate.

In dissent, Judge Mayer would not have limited the coordinate to "a longitude latitude pair."

"In mathematics, there are many types of coordinate systems and the common ground is that they all define a point. For instance, in a curvilinear system, coordinates are defined with a fixed origin point, and a scalar distance offset from that point along a known curve, such as a section of road. A distance offset necessarily has a "partner" to define a point, as offsets are necessarily set off from another known point. A coordinate should not be construed to exclude defining a point by an offset from another point along a known path."

In Hal Wegner's words, this decision "demonstrates the different views that can be reached by reasonable minds on claim construction issues which, due to appellate de novo review, creates the opportunities for so much judicial uncertainty." And, as suggested by dissenting judges in Phillips v. AWH, that en banc decision did little to create predictability in claim construction.

CAFC Finally Affirms a Finding of Infringement by Equivalents

Dr. Voda v. Cordis Corp. (Fed. Cir. 2008)

Dr. Voda’s case is an exciting tale of an individual inventor litigating against a major corporation in the red sandy soil of western Oklahoma. 

A jury found that Cordis catheters infringed Voda’s patents and adjudged a reasonable royalty to be 7.5% of gross sales. The jury also found the infringement willful and the patents not invalid.  The district court then affirmed the jury verdict but denied Voda’s request for injunctive relief.

Claim Construction: Voda’s claim included the requirement that the catheter be engaged “along a line” of the aorta. The district court, however, found that the claim is not limited to linear portions of the aorta. On appeal, the CAFC confirmed the construction — reminding us that “the context in which a term is used in the asserted claim can be highly instructive.” Phillips. When engaged, it is clear that the catheter may curve along the aorta.

The specification does indicate that the “present invention [includes a] straight portion.” However, the CAFC refused to see that statement as a “clear disavowal of claim scope” because the specification discusses other instances where the same portion could be curved.

Doctrine of Equivalents: Cordis had redesigned some of its products to avoid literal infringement. However, these were found to infringe under the Doctrine of Equivalents. In particular, a “second straight portion” claim element was not literally found in the Cordis products, but the jury found that the products did include an equivalent element.

At the court’s option, either of two tests of equivalent may be used:

Under the insubstantial differences test, “[a]n element in the accused device is equivalent to a claim limitation if the only differences between the two are insubstantial.” Honeywell Int’l Inc. v. Hamilton Sundstrand Corp., 370 F.3d 1131, 1139 (Fed. Cir 2004). Alternatively, under the function-way-result test, an element in the accused device is equivalent to a claim limitation if it “performs substantially the same function in substantially the same way to obtain substantially the same result.” Schoell v. Regal Marine Indus., Inc., 247 F.3d 1202, 1209-10 (Fed. Cir. 2001).

The CAFC looked to Voda’s experts to find evidence of insubstantial difference. In particular, Voda’s expert testified that the Cordis “curve portion” was essentially straight and that “cardiologists would have difficulty distinguishing the two during use.”  In addition, Voda introduced evidence that the Cordis curve portion “performed the same function as a straight portion, in the same way, to achieve the same result. . . . Accordingly, we affirm the jury’s findings of infringement with respect to these claims.”

Notes:

• EBay: Voda argued for an injunction based on the irreparable harm to its exclusive licensee. The CAFC rejected that justification — finding that the irreparably harmed must be the party seeking the injunction.
• Seagate: The CAFC vacated the willfulness finding that was based on pre-Seagate law.
• Festo: The CAFC did find that some of Voda’s claims were not infringed under the DOA. Those claims had been narrowed during prosecution and were subject to prosecution history estoppel.
• Prior Appeal: In the 2007 appeal in this case, the CAFC held that Voda could not assert its foreign patents covering the same product in US courts. [LINK]
• See Lemley & Allison: THE (UNNOTICED) DEMISE OF THE DOCTRINE OF EQUIVALENTS

 

Applying Festo to Claim Construction: Construing an Amended Claim

University of Texas v. BENQ, et al. (Fed. Cir. 2008)

In 2005, UT filed suit against a total of fifty-six defendants alleging infringement of claims 10 and 11 of its patent that converts text messages into binary syllabic elements before transmission.  After claim construction, the district court granted summary of non-infringement. 

Construction of Amended Claim: The appeal focuses on the term “syllabic element.” UT wanted the phrase to be broader than “a character set of one syllable.”  In its analysis of claim construction, the CAFC looked to the prosecution history.

After receiving a rejection during prosecution, UT added the “syllabic element” term to replace “an alphabetic character string” and cancelled a dependent claim directed toward matching whole words.  On appeal, the CAFC gave “substantial weight” to these amendments — presuming that the amended phrase could not be as broad as the original:

“[C]laim 10 originally recited matching with an alphabetic character string, while one of its dependent claims specified that this string comprised a word. After the examiner identified a reference that showed matching with a word, the Board of Regents limited claim 10 to require matching with syllabic element(s) and canceled the dependent claim that required matching with words. The cancellation of this dependent claim indicates that the set of “syllabic elements” does not include all words.”

In addition, because the amendment was made in order to overcome a prior art reference, the CAFC found it would be nonsensical to give the claim a definition as broad as the original:

“Moreover, if "syllabic elements" included words, then [the prior art] disclosure of matching with words would teach the portion of claim 10 that was amended to distinguish [the prior art]. We decline to adopt a construction that would effect this nonsensical result.”

Finally, the CAFC chose to hold the prosecution history against the patentee by ignoring potential arguments that lack explicit support in the intrinsic record.

“While the Board of Regents might have been able to distinguish [the prior art] on this ground, the intrinsic record fails to support the argument that it actually did so.”

Intermittent Infringement: The asserted method claim uses a comprising transition and requires that “each pre-programmed code being representative of a syllabic element.”  The accused products do use pre-programmed codes, but only some of them are representative of syllabic elements. Thus, the question on appeal was whether the claims require a vocabulary that includes only syllabic elements.  With some sophistry, the CAFC arrived at the result that an infringing vocabulary would only include syllabic elements. In particular, the claim reads as follows:

“…matching said binary code with one or more pre-programmed codes, each pre-programmed code being representative of a syllabic element; [and]

[f]orming a representation of the word from the one or more syllabic elements represented by the matched one or more pre-programmed codes…“

 Here, the CAFC used its grammatical analysis to find that the “matched” pre-programmed codes are a subset of the whole set of “each” pre-programmed code. The claim requires each pre-programmed code to be a syllabic element, ergo the entire set of pre-programmed codes must be in syllabic element form. q.e.d.

Claim construction and resulting summary judgment affirmed.

 

 

Limiting the number of claims construed

Hearing Components v. Shure (E.D.Tex. 2008)

Prior to the Markman hearing, the parties jointly requested a page length exception for their briefs.  The problem, they argued, was that the three hearing aid patents in suit included a large number of disputed claims.

In a recent order, Eastern District of Texas Judge Clark denied that request and further ordered that “the parties shall elect no more than ten (10) disputed claim terms for construction … [based on] no more than three (3) representative claims from each patent for claim construction and trial.”

Judge Clark justified the limitation based on his duty to ensure a “just, speedy, and inexpensive determination of every action and proceeding.”  However, the decision opens the door for appeal for either party based on the Federal Circuit’s April 2008 decision in O2 Micro. In that case, the court held that it is the court’s duty to resolve claim construction disputes:

“When the parties raise an actual dispute regarding the proper scope of these claims, the court, not the jury, must resolve that dispute. . . . When the parties present a fundamental dispute regarding the scope of a claim term, it is the court’s duty to resolve it.” 

The resolution will be a middle ground that allows courts to control the trial process but gives litigants the right to have their disputes resolved. Perhaps the solution is to require some threshold explanation as to why each additional term needs to be construed.

• Read O2 Micro
• Read Judge Clark's Order
• See E.D.Tex Blog
• Hearing Components, Inc v. Shure, Inc (9-07-cv-00104) TXED

 

Tags: EDTX

Prison: The last stand for land line phones.

TIP Systems v. Phillips & Brooks (PBG) (Fed. Cir. 2008)

"This is a patent infringement case pertaining to wall-mounted telephones designed for use by prison inmates."  Both the accused device and the patents focus on a telephone system that operates without the dangers of a phone cord. However, the TIP patents require a "handset" mounted in the wall of the phone box with a mouthpiece that "extends through" the wall.  These claims are exemplified in the figures.

The accused devices do not use a traditional handset, but rather use a separate ear-piece and mouthpiece. In addition, the accused device wall is flush – and the mouthpiece does not break through the wall.

Questionable claims of infringement are naturally resolved by a Markman hearing and subsequent summary judgment of noninfringement. Here, the district court found (i) that the claimed handset must include a handle with both an ear-piece and mouthpiece and (ii) that the mouthpiece must pass through an aperture in the front wall of the phone box.  It was clear that the accused device did not exhibit either of these features and thus could not infringe.

The definition of the handset was made easy because the claims stated that: "a telephone handset being a handle with an ear-piece at one end and a mouthpiece at an opposite end." The exact definition is support from the figures is also provided in the specification.

The CAFC affirmed on claim construction then went on to consider whether the elements may still be covered under the doctrine of equivalents (DOE). 

If an element is not literally covered by a claim, the device may still be considered infringing if the accused element is equivalent to the claimed element. Thus, to infringe a patent, each claim element or its equivalent must be found in an accused device.

Whether equivalency exists may be determined based on the "insubstantial differences" test or based on the "triple identity" test, namely, whether the element of the accused device "performs substantially the same function in substantially the same way to obtain the same result." 

The game in the doctrine of equivalents is defining an 'element.'  The patentee wants a broad definition (the telephones as a whole are very similar) while the defendant argues for a narrow definition. Here, the defendants won when the courts found that a "handle" is an element of the claim.  Since the accused devices have no structure that is similar to a handle, they cannot infringe even as an equivalent.

  

Deciding Infringement During Claim Construction

ADC Telecommunications v. Switchcraft (Fed. Cir. 2008)(nonprecedential)

Patent law precedent requires a judge to interpret any disputed claims of a patent prior to sending the case to a jury to determine factual issues of infringement. 

“First, the court determines the scope and meaning of the patent claims asserted. . . . [Second,] the properly construed claims are compared to the allegedly infringing device.” Cybor Corp. v. FAS Techs., Inc., 138 F.3d 1448, 1454 (Fed. Cir. 1998) (en banc) (citations omitted).

There is a strong tendency, however, to push the judge toward deciding the infringement issue within a Markman hearing — leading to a potentially quick summary judgment conclusion. Thus, parties often ask the judge to determine whether or not claimed element “X” should be interpreted to cover “Y” - where Y is an element of the accused product.

This infringement litigation involves a patent covering a coaxial switch that includes a mechanism for impedance matching.  Dueling experts used different testing mechanisms to prove (non)infringement of the accused device. Hoping to short-circuit the infringement determination, the defendant argued that that proper construction of the claims require a its method for testing for infringement. The CAFC disagreed because the claims lacked any textual hook for requiring a particular testing method and because the specification lacked “any clear indication” of a particular test. Relying upon its 2005 Union Carbide decision, the court found that “[b]ecause the claim language does not require a particular form of testing, this inquiry is not a claim construction question, which this court reviews de novo. Rather, this court reviews this inquiry as a question of fact.”

Thus, the CAFC affirmed the lower court’s decision and ruling that the “dispute over the proper testing method is … a factual question that the district court properly submitted to the jury.”

Existence of Non-Asserted Claims Allows Court to Disregard Construction Canon Encouraging Coverage of Preferred Embodiment

Helmsderfer v. Bobrick Washroom Equipment (Fed. Cir. 2008)

John Helmsderfer sued Bobrick for infringement of its patent covering tamper-resistant diaper changing stations.  After a markman hearing, the Southern District of Ohio district court awarded the defendants summary judgment of non-infringement. Helmsderfer appeals on claim construction.

Partially Hidden from View: The claims include a top surface platform that is “partially hidden from view.” On appeal, the patentee argued that “partially hidden” could include “totally hidden.” The CAFC disagreed for two textual reasons:

1. The patent used “generally” in other portions of the claim but not for this element — providing evidence that the patentee was intentionally distinguishing between those two modifiers.
2. The patent used “at least” in other portions of the claim but not for this element — providing evidence that in this case the patentee did not intend to claim “at least partially.”

Quoting its own 2000 CAE Screenplates decision, the court reasoned that “[i]n the absence of evidence to the contrary, we must presume that the use of these different terms in the claims connotes different meanings.” Here, the court could find no evidence to find that partially should include totally.

Exclusion of preferred embodiment: The applicant did point that its preferred embodiment and also “every illustrated embodiment” would be excluded by the narrow definition of “partially hidden.”  The CAFC, however, rejected that such an exclusion creates any problem here. In particular, the court noted that it was analyzing only teh two claims (6–7) at issue in the case — “[O]ur construction of claims 6–7 leaves open the possibility that claims not at issue in this appeal encompass omitted embodiments. It is often the caes that different claims are directed to and cover different disclosed embodiments. The patentee chooses the language and accordingly the scope of his claims.” 

The appellate panel gave lip service to the precedential canon of avoiding claim interpretation that “excludes the preferred embodiment from the scope of the invention.”  However, in the end the court gave absolutely no weight to that “caution” in its claim interpretation.  Rather, the decision notes the distinction between the patent as a whole and the particular asserted claims.  In this case, the court noted that other claims are included in the patent and that those may be the ones that cover the preferred embodiment. 

This interpretation falls on the heels of the PSN Illinois v. Ivoclar Vivadent holding that sometimes unasserted or cancelled claims directed to a particular disclosed embodiment may actually serve as evidence that the scope of the asserted claims does not extend to that embodiment.  PSN Illinois – written by Judge Michel – applies the sensible notion that non-asserted or cancelled claims should be examined to determine if the preferred embodiment is found there. Helmsderfer extends that notion by creating an apparent presumption that – if non-asserted claims exist, then the court need not consider the rule of construction that encourages encompasing preferred embodiments.

Notes:

• Preferred Embodiment: Relation to Tafas v. Dudas: Although the patentee lost here, Judge Moore’s decision here creates some interesting support for the Tafas case – by holding that it is the patentee’s right to file alternative claims to cover various parts of the disclosed embodiment.
• Drafting Thoughts: Non-numeric range limitations – such as “partially” – have benefits and potential liabilities. When including a limitation of this type, you may do well to consider what prior art you are attempting to avoid — and consequently claim either “at least partially” or “at most partially.”

... and See What Sticks: Claim Construction Appeals

Rattler Tools v. Bilco Tools (Fed. Cir. 2008) (nonprecedential)

Rattler sued Bilco in the Eastern District of Louisiana -- alleging that Bilco's magnetic scrapper (used to clean out oil wells) infringed several patents. After a bench trial, the district court found the patents completely non-infringed. In particular,the district court held that the "accused products and methods did not meet any of the thirteen limitations ofthe ten asserted claims."

Rattler appealed -- asking for a new claim construction for each of those thirteen limitations.  Without any detail analysis, the CAFC politely showed Rattler the door.  "We have considered all of Rattler’s arguments. Having done so, we see no reason to disturb the careful and thorough post-trial decision of the district court."

This case is unremarkable in its short analysis, but does serve as a reminder of the current state of patent appeals.  The conventional wisdom that the CAFC re-writes a large percentage of claim construction decisions leads most losing parties to appeal on claim construction.  At the same time, appellants are also including more claim construction arguments in each appeal. 

Lower Court MUST Construe All Disputed Terms

O2 Micro v. Beyond Innovation, et. al (Fed. Cir. 2008)

A jury found O2 Micro’s DC/AC converter patents willfully infringed and not invalid. The Eastern District of Texas court (Judge Ward) then issued a permanent injunction.

Waiver of Claim Construction Appeal: During a Markman hearing, the parties sparred over the definition of the term “ONLY IF”. Rather than issuing a claim construction decision, the district court decided that the common phrase needed no explanatory construction. After having lost to the jury, the defendants appealed the lower court’s failure to construe the ONLY IF phrase.  However, because the defendants did not specifically object to the jury instructions, O2 Micro argued that the the defendants has waived their right to appeal. 

The issue of waiver of claim construction has been raised before, and the CAFC dismissed it again — this time by quoting the CAFC’s own 2004 Cardiac Pacemakers opinion:

“When the claim construction is resolved pre-trial, and the patentee presented the same position in the Markman proceeding as is now pressed, a further objection to the district court’s pre-trial ruling may indeed have been not only futile but unnecessary.”

Thus, if disputed at a Markman hearing, claim construction appeal issues are not waived by failure to object to jury instructions. Furthermore, the CAFC will also allow new arguments to be presented on appeal justifying the previously proposed construction.

Construing all the terms: Although the meaning of the phrase “ONLY IF” was disputed by the parties, the district court failed to construe the term. In its decision, the CAFC vacated — finding that the disputed phrase should have been construed. By failing to define the term, the court essentially passed the construction dispute to the jury.

“When the parties raise an actual dispute regarding the proper scope of these claims, the court, not the jury, must resolve that dispute. . . . When the parties present a fundamental dispute regarding the scope of a claim term, it is the court’s duty to resolve it.”

In deciding this issue, the CAFC indicated that claim construction requires determining both the meaning of the words in the claim and the scope encompassed by the claim. Further, even ordinary terms need construed when they are susceptible to multiple interpretations.

Overburdening: Over the past decade, the number of terms being construed (and appealed) has risen dramatically. In its decision, the CAFC at least waived its hands at the problem — recognizing “that district courts are not (and should not be) required to construe every limitation present in a patent’s asserted claims.” (Emphasis in original). No, the court only needs to construe those claim terms that are disputed, subject to alternative theories, that could be helped by clarification, and when otherwise necessary to describe the claim coverage.

Meaning and Scope: This case is quite important because it shifts even more power and importance onto the issue of claim construction and away from a jury’s factual determination of infringement and novelty. 

 

Claim Interpretation Should Include Disclosed Embodiments

Oatey v. IPS (Fed. Cir. 2008)

Oatey’s asserted claim is directed to a washing machine drain with “first and second juxtaposed drain ports.”  The patentee originally lost on summary judgment of noninfringement because the district court construed that element to require “two separate identifiable physical elements” and not simply a single divided drain port. Thus, the lower court agreed that the claim would cover the design showed in Figure 2 of the patent, but excluded the design shown in Figure 3.

On appeal, the CAFC reversed. Writing for a unanimous panel, Judge Newman held that absent disclaimer or estoppel, claims should normally be interpreted to include disclosed embodiments.

We normally do not interpret claim terms in a way that excludes embodiments disclosed in the specification. . . . At leas[t] where claims can reasonably [be] interpreted to include a specific embodiment, it is incorrect to construe the claims to exclude that embodiment, absent probative evidence on the contrary.

Because there was no evidence of disclaimer or prosecution history estoppel, Judge Newman found that the claim must be given a broader construction.

Notes:

• U.S. Patent No. 6,148,850.
• Lower Court Judge was Kathleen O’Malley (who has tremendous patent experience).

Gillespie v. DWIDAG: Prosecution Arguments Limit Claim Scope

Gillespie v. DWIDAG Systems (Fed. Cir. 2007)

During prosecution, Gillespie argued around a cited prior art mine roof bolt reference — arguing that the collar of the bolt ‘appears to be cylindrical on the outside, thus impractical…’ Reviewing claim construction de novo, the appellate panel led by Judge Newman limited the claim scope to only cover non-cylindrical collars. (Following the maxim that a “patentee is held to what he declares during the prosecution of his patent.”).

Gillespie argued that the claims should not be limited by his statements because the non-cylindrical collar shape did not turn out to be material to allowance. (The Examiner provided alternative reasons for allowance). The CAFC rejected that potential loophole – finding that Gillespie’s argument was sufficient regardless of its importance in the prosecution process.

DWIDAG’s bolts were thus found to not infringe this new construction.

Notes:

• The court appears to have been careful not to use the term disclaimer. 

 

Prosecution Disclaimer Narrows SOME of the claims

Ormco v. Align Technology (CAFC 2007, 06–1240)

Here, prosecution disclaimer narrowed Ormco’s patent claim scope, but only for some of the claims.

Ormco’s invention relates to computer-aided design of orthodontics.  During prosecution Ormco distinguished its invention based on its automated calculation of final tooth position even though the claims do not explicitly require fully automated calculations.  Although finding the disclaimer clear, the CAFC required some relation between the disclaimer and any affected claim before narrowing claim scope. As a consequence, the scope disclaimer only applies to claims directed at finish tooth positions and not to other claims — such as those directed to preliminary organization of tooth data.

Dissent: Dissenting from the majority opinion, Judge Kathleen O’Malley (N.D.Ohio, sitting by designation) criticized both the majority and the lower court for their procedural sloppiness.  Judge O’Malley would have remanded to wait for a more developed opinion from the district court.

Notes:

• In passing, the court reminds us that the existence of prosecution disclaimer is determined within the claim construction phase – and thus reviewed de novo.
• The patents at issue are quite hefty for this type of technology – 97 pdf pages.

CAFC: Meaning of "About"

Ortho-McNeil Pharm. v. Caraco Pharm. (Fed. Cir. 2006).

Ortho’s patent covers a pain-relief combo of tramadol and acetaminophen with a ratio of “about 1:5.” Caraco’s drug has a ratio of 1:8.67.  The lower court construed the claims and found no infringement.

Claim Construction: On appeal, the Federal Circuit construed the term “about 1:5” by first looking at the intrinsic evidence.  In the patent and claims, Ortho had used the term “about” repeatedly: disclosed ratios included about 1:1, about 1:5, about 1:19 to about 1:5, and about 1:1600. 

The court reasoned that the term must have a narrow meaning in this patent because a broad meaning would leave other claimed ratios meaningless. The court also noted that the literal meaning of the term should be narrowly construed because Ortho “could have easily claimed a [broader] range of ratios”

An expert testified that the statistical range should be 1:3.6 to 1:7.1 based on a confidence interval constructed from the data in the patent, and the Federal Circuit agreed. (The patent discussed the importance of 95% CI).

Literal Infringement: The Federal Circuit found that there could be no literal infringement because the upper claimed bound for the ratio was 1:7.1 while Caraco’s ratio was 1:8.67.

Doctrine of Equivalents: No DOE because Ortho cancelled claims with broader range during reissue. Interestingly, the Court made this ruling based on vitiation rather than prosecution history estoppel:

[I]t cancelled the broader "comprising" claims, except for claim 6. In sum, having so distinctly claimed the "about 1:5" ratio, Ortho cannot now argue that the parameter is broad enough to encompass, through the doctrine of equivalents, ratios outside of the confidence intervals expressly identified in the patent. We agree with the district court that to do so would eviscerate the limitation.

Summary judgment of noninfringement affirmed

IPO Supports Attorney Fee-Shifting, Opposes PTO Authority

The Intellectual Property Owner’s Association (IPO) has taken a new stand on patent reform through its passage of three specific resolutions in reaction to the pending Senate bill S.3818 that had been supported by Senators Hatch and Leahy. Resolutions:

(1) supporting a requirement that a court award attorney fees to the winning party in most patent cases; [fees “shall” be awarded unless the losing position was “substantially justified”or if the award would be unjust because of special circumstances].

(2) opposing any change to give substantive rule-making authority to the USPTO; and

(3) opposing any right for an interlocutory appeal from claim construction decisions in patent litigation.