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This page provides information about patents and other forms of intellectual property such as trademarks and copyright.
Intellectual Property Resources
Google Patents - Advanced Search
Search full text (PDF) of patents from 1790-present. Advanced Search allows searching by assignee, inventor, date, etc. Monitor patents with RSS feeds for searches.
USPTO Web Patent Database
1975-present: Search by number, dates, assignee, inventor, title, abstract, U.S. and international classifications and many other fields. 1790-1974: search by patent number only.
Espacenet offers free access to more than 80 million patent documents worldwide, containing information about inventions and technical developments from 1836 to today.
Free chemical structure searching of US patents. Requires free registration.