WestlawNext has cases from the U.S. Supreme Court, courts of appeals, district courts, bankruptcy courts, Court of Federal Claims,Tax Court, military courts, and related federal and territorial courts that relate to intangible property rights such as copyright, trademark, patent, trade-secret, and other similar rights. Coverage begins with 1789.
On the welcome screen select Intellectual Property from the Topics section on the right hand side. On the next screen, Choose Cases.
Lexis Advance has a number of IP databases.