Derwent World Patent Index
Available on WestlawNext Includes editorially enhanced information on more than 20 million patent families. Covers 1963 - present.
Google Patent Search Includes the entire collection of granted patents and published patent applications from the USPTO, EPO, and WIPO. US patent documents date back to 1790, EPO and WIPO date back to 1978.
Patentscope (WIPO) Provides access to international Patent Cooperation Treaty (PCT) applications in full text on the day of publication.
PCT Patent Applications
Available on WestlawNext Includes patent applications filed with the World Intellectual Property Organization (WIPO) pursuant to the Patent Cooperation Treaty, including related versions, such as republications. Covers 1978 - current.
USPTO Patent Classification Includes the Cooperative Patent Classification (CPC) scheme and definitions; the United States Patent Classification (USPC) schedules, definitions, and the Index to the USPC; and the International Patent Classification (IPC) scheme, definitions, and catchword index.