The Connecticut State Library will be closed on Thursday, November 27 in observance of Thanksgiving.

Patents - U.S.

Selected resources for researching U.S. patents

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Patent Research

We support research on U.S. patents -- historical and contemporary. Connecticut's history of industry and invention is an important focus of the Library.

There are a number of resources on patents available at and through the Connecticut State Library & Museum of Connecticut History

The United State Patent & Trademark Office (USPTO) offers General Information Concerning Patents.