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Patents and Trademarks

Patent & Trademark basic information, databases, links for legal and status information

Search Most Often Used Patent Databases

These web databases allow free access for everyone.

Citation Search (on campus, or with UMD password)

Databases- Onsite Only

Derwent Innovations Index (requires UMD username/password)

  • Search international patents back to 1963; many have hot links to later patents that cite them as prior art


  • Please call ahead: Librarian login required
  • Faster than the USPTO free web databases
  • Offers more features and search capabilities than the USPTO free web databases
  • Includes international patents


  • DVD-ROM (not a searchable database)
  • All US Patents (scanned images) 1790-Present


  • DVD-ROM (not a searchable database)
  • All Registered U.S. Trademarks (scanned images) 1870-Present
  • Includes over 600,000 "Dead" (abandoned) marks NOT available in TESS (These images are also available online in Trademark Status & Document Retrieval (TDR)

Official GazetteMicrofilm 

    vol.1(1872) - vol.845(1967)

Paper OG in offsite storage: 1943-1998 (ask  Librarian for assistance)

But current year OGs are online:

DVD/CD-ROM Archives

These are mostly backup archives, but they are sometimes faster, or better for downloading huge sets of data, spreadsheets, etc.

Cassis Patent & Trademark Assignments Comparable web sites: Patent Assignments and Trademark Assignments

Cassis Patents BIB
Search abstracts 1988-present
Search titles 1969-present

Cassis Trademarks BIB Less information than USPTO Trademark Search, but faster printing/exporting

Cassis Patents Assist Includes Art Unit/Supervisory Examiner index, Attorneys & Agents list, and classification search options not available on the web

Patent Abstracts of Japan
Largely replaced by Espacenet and PAJ online

Replaced by Espacenet

Backup archive for Depatisnet