Lexis and Westlaw both collect cases by subject matter; in either, navigate first to the Practice Area tab, then select Patent (Lexis) or Intellectual Property (Westlaw), and then scroll to Cases.
The following is a non-comprehensive list of a few additional, patent-specific sources for case law.
For information on researching case law, see Georgetown Law Library's Case Law Research Guide or the Case Law Research Tutorial.
In addition to the above, a variety of patent-related administrative materials are available in collections on Lexis, Westlaw, and Bloomberg Law at the following locations:
For more on administrative legal research, generally, refer to our Administrative Law Research Guide or Administrative Law Tutorial.