How to File Your Patent Application Documents in DOCX (USPTO)
Patents at the University of Kentucky
University of Kentucky and PatentsInformation on patents and patent licensing process at the University of Kentucky. Also contains a listing by year of assigned patents.
What's the Difference Between Patents, Trademarks and Copyrights?
Patent ClassificationUSPTO adopts Cooperative Patent Classification. Check the mapping USPC to CPC to see where your patent area falls in the new classification scheme.
CAS Coverage of PatentsCAS covers patents from around the world. Patent records from nine major patent offices worldwide that meet CAS selection criteria are available online in CAplusSM within two days of the patent's publication, and fully indexed by CAS scientists within 27 days from the date of issue.
Patents are selected from over 35,000 International Patent Classification (IPC) codes and 99 U.S. National Patent Classification Codes.
Find Patents
Canadian Patents DatabaseThis database lets you access 93 years of patent descriptions and images. You can search, retrieve and study more than 2,140,000 patent documents.
Espacenet Patent SearchEspacenet offers free access to more than 80 million patent documents worldwide, containing information about inventions and technical developments from 1836 to today.
Free Patents OnlineBasically free full-text and/or images of patents from a variety of sources worldwide. Includes combined search option so you can search U.S., U.S. patent applications, European Patents, Japanese Patents (abstracts only), and WIPO. Also has a new chemical patent search feature. Be sure to check coverage for each database prior to searching.