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Patent Databases Research Guide

Free Patent Data Sources

Patent Database Research Guide

Researchers may monitor global technology developments, check that their research is unique and keep track of  competitors by effectively searching Patent Data Sources.  This is a guide to free Patent Data sources available on the internet.




plural noun: patents


a government authority or license conferring a right or title for a set period, especially the sole right to exclude others from making, using, or selling an invention.

Patent Searching on Lexi Uni

LexisNexis Uni (formerly LexisNexis Academic)  This link opens in a new window


Backward and Forward Patent Citation Search Sources

There are 2 different types of citations: backward and forward citations. Backward citations are patents that are cited by a specific patent and forward citations are patents that cite a specific patent


Google patents

USPTO Search


Patent Evaluation Sources

What are Patent Claim Charts?