Patent databases of the U.S. Patent and Trademark Office: U.S. patent specifications (including utility, design, reissue, plant patents and SIR documents) in full text since 1976, full page images are available for the period from 1790. Patent applications in full text since March 15, 2001.
Please note: Patents from 1790 to 1975 are only searchable by patent number, issue date and current U.S. classification.
The Patent Public Search tool is a new web-based patent search application that replaced legacy search tools PatFT and AppFT.