Search the USPTO's patent database to see if a patent has already been filed or granted that is similar to your patent. Patents may be searched in the USPTO Patent Full-Text and Image Database (PatFT). The USPTO houses full text for patents issued from 1976 to the present and PDF images for all patents from 1790 to the present.
Nexis Uni® features more than 15,000 news, business and legal sources from LexisNexis—including U.S. Supreme Court decisions dating back to 1790—with an intuitive interface that offers quick discovery across all content types, personalization features such as Alerts and saved searches and a collaborative workspace with shared folders and annotated documents.
SciFinder® is a research discovery application that provides integrated access to the world's most comprehensive and authoritative source of references, substances and reactions in chemistry and related sciences. How to Create An Account