Historical Patent and Trademark Databases
- The Canadian Patent Office Record and register of copyrights − Hathi Trust Digital Library
- Decisions of Commissioner of Patents and U.S. courts in patent and trademark − Hathi Trust Digital Library
- Design Patents to 1873*
- Directory of American Tool and Machine Patents (DATAMP)
- Disclaimer Patents 1837-1873*
- Extension Patents to 1865*
- Improvement Patents to 1861*
- Index of trademarks issued from the United States Patent and Trademark Office, 1927-1991 (incomplete) − Hathi Trust Digital Library
- Official Gazette of the United States Patent Office, 1899-2002 − Hathi Trust Digital Library
- Patent Indexes & Annual Reports from the Commissioner of Patents, 1790-1958 (incomplete) − Hathi Trust Digital Library
- Reissue Patents 1838-1873*
- Trademarks 1870-1873*
- Utility Patents 1-65000*
- Utility Patents 65000-100000*
- Utility Patents 100001-146119*
- X-Patents (names, dates, PNs only)*
- X-Patents (with added fields)*
* Content courtesy of Jim Shaw, Hutchinson, Kansas