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Intellectual Property Research: Searching for Patents

A guide to the major information sources of intellectual property legal research.

Patent Databases

International Patent Databases

Below is a sampling of patent databases offered by organizations and countries throughout the world.

Patent Search Guides & Tutorials

Patent Search Guidebooks

Patent Classifications

Patent classifications organize the body of inventive knowledge into a searchable index.  With patents assigned classification numbers or headings, researchers can hone in on their target, supplementing a terms and connectors search to come up with a better result.