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Patents and Trademarks
Provides an introduction to patents, how to search for patents, & basic information on trademarks.
Google Patents covers the entire collection of granted patents and published patent applications from the USPTO, EPO, and WIPO. US patent documents date back to 1790, EPO and WIPO to 1978.
Offers free access to information about inventions and technical developments from 1782-present for European countries as well as other countries. Full-text access varies based on country.
This page has TWO options:
Patent Database - Search for U.S. patents 1790-present (1790-1975 searchable only by Issue Date, Patent Number, and Current US Classification).
Application Database - Published applications from 2001-present
