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.
Lexis/Nexis Academic is a full-text database which focuses primarily on business, legal and news resources. Included in the database are law reports, company filings, journal and newspaper articles, broadcast transcripts, etc
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