Includes legal status information. Database search page is in English, but you must use Emperor's year for years prior to 1999. The European Patent Office's extensive list of patent resources with links to individual countries' patent offices, databases, patent providers, and other useful international patent information. Not recommended for searching. Good for viewing known US patents in PDF format.
Registration is required.
Use the 'View Patent' button at top of screen to see patent. Commercial vendor providing free access to U.S. patent abstracts only. STO's Index to the Manual of Classification Current to 1993. Web-based listing of the U.S.P.T.O. index to patent classification. Use first as an aid to the Manual of Classification.