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U.S. Patent Office Information
Web site offers classification and patent searching, information about patents and trademarks, and directories of public information about patents.
Patents
U.S Patent and Trademark Office (USPTO)
- Web site offers classification and patent searching, information about patents and trademarks, and directories of public information about patents.
US Patent Classes by Number and Title
Order Copies of U.S. Patent and Trademark Documents
Patent Classifications (Alphabetical)
Patent Classes by Number with Title
International Patent Treaties
Patent Cooperation Treaty (PCT) Addresses and Forms
Members of World Intellectual Property Organization (WIPO) Treaties
Patent Cooperation Treaty (PCT), Regulations and Administrative Instructions
Trademarks
Trademark Acceptable Identification of Goods & Services
Trademark International Schedule of Classes of Goods and Services