The innovation alliance has a well engineered video focusing on various inventor-patentees explaining the “value of a strong patent system.”
A couple of the inventors (Richard Dean, Qualcomm & Rob Smithson, Fallbrook Tech) make the argument that strong US patents preferentially generates R&D in the US. I don’t really understand that argument. US patents are available to inventors from around the world almost regardless of where the R&D took place. As a consequence, a strong US patent regime provides a global incentive to innovate products that will be valued in the US.