Skip to main content

Patents and Trademarks

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

Search Most Often Used Patent Databases

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

Hours | Directions | Maps & Floor Plans | Jobs | Contact Us

Information for: Visitors | People with Disabilities

© 2015 University Libraries, University of Maryland
McKeldin Library, Library Lane, College Park, MD 20742-7011
(301) 405-0800
Website Comments | Privacy Policy