The CP kills uniformity and innovation – also causes rent seeking

There is an easy case to be made against giving states more influence over the patent system. For the patent system to work well, the Supreme Court has repeatedly emphasized, uniform nationwide rules are key.17 Otherwise, individual states could upset the balance between encouraging innovation and protecting competition and a robust public domain.18 State laws that specifically target patent-holders and make it harder to exercise their patent rights are especially likely to upset this balance, since they directly undermine the incentives that patent law is designed to promote. State laws are also troublesome because they can represent an attempt by residents of that state to extract rents from outsiders, whether by strengthening or weakening patent rights.