USPTO, a federal agency in the Department of Commerce, includes extensive information on Patents and Trademarks as well as a Patent Tutorial. Obtain copies of forms, information on fee structure and extensive general information on U.S. patents and trademarks. The Patent Full-Text Database is searchable back to 1790. The years 1790-1975 can be searched by class and patent number only.
Provides indexing and full text pantents and applications from European and other patent offices worldwide, including U.S., Japan, and Germany. (EP, WIPO/PCT, US, GB, FR, DE, JP, and over 70 countries). You can save PDFs of available documents up to a certain page limit. This is the site SciFinder links to for non-U.S. patents. 1836-present
Indexes and cross-references worldwide chemical patents. Note: PatentPak is an add-on workflow tool within SciFinder to enhance access to and analysis of full text patent documents. UTSA does not subscribe to PatentPak functionality apart from 5 free trial uses per user account.