U.S. Patents and Trademark Office's Patent Fulltext database
U.S. Patent and Trademark Office
U.S. Patents Original Publications contains the complete text of U.S. patents and current classifications for the original publication of patent documents issued by the U.S. Patent and Trademark Office from 1975 to the present, with partial coverage of selected technologies from 1971-1974, and defensive publi ca tions from 1976 to the present. USPATOLD includes more than 3.5 million records and covers the full text of patents issued from the U.S. Patent and Trademark Office (USPTO) from 1790-1975.