This paper assesses the impact of adopting a post-grant review institution in the US patent system by comparing the … 'opposition careers' of European Patent Office (EPO) equivalents of litigated US patents to those of a control group of EPO … employing these different methods in our data analysis. We find that EPO equivalents of US litigated patent applications are …

Critics claim that patent screening is ineffective, granting low-quality patents that impose unnecessary social costs …. We develop an integrated framework, involving patent office examination, fees, and endogenous validity challenges in the … courts, to study patent screening both theoretically and quantitatively. In our model, some inventions require the patent …

The contributory infringement rule assesses liability to a third party that contributes to the infringement of a patent …