Index to the US Patent Classification System
Browse the index to find classes and subclasses for different technologies and designs. This is the first place to begin your preliminary patent search.
USPTO PatFT and AppFT
The United States Patent and Trademark Office (USPTO) patent grant and patent application databases.
Espacenet - European Patent Office (EPO)
The worldwide database enables you to search for information about published patent applications and grants from over 92 different countries and regions.
PubEAST and PubWEST
Located in the Special Collections Department of the Main Street Library, PubWEST is used by USPTO patent examiners. Contact us to make a reservation.
Before you visit, it is recommended you watch this online tutorial on conducting a preliminary patent search. This tutorial was created by the U.S. Patent and Trademark Office, USPTO, an agency of the Department of Commerce.