Patent Law: Cases, Problems, and Materials (3rd Edition 2023) is an open-access casebook, co-authored by Professor Jonathan S. Masur (University of Chicago Law School) and Professor Lisa Larrimore Ouellette (Stanford Law School). The casebook is made available under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. A digital version of the casebook can be downloaded free online.