Database by Subject: Patents

Title Notes

Defense Technical Information Center (DTIC)

From the DoD (Department of Defense)

Free Patents Online

Free, full-text, searchable access to patents from 1976 to the present; TIFF or PDF copies of patents can be downloaded for free (TIFF is downloaded one page at a time); free registration required to display PDF files.

Google Patent Search

Beta site offering searchable access to US patents from 1790 to mid-2006 (Google plans to expand coverage over time); patents can be downloaded as PDF files.

LexisNexis Academic

News, business and legal information including federal and state cases and statutes, and U.S. Supreme Court decisions since 1790.

USPTO (US Patent and Trademark Office) Databases

Free, full-text access to all patents filed with USPTO; patents from 1976 to the present are searchable and patents from 1976 to the present are available as images