Account logins, new ebook checkouts, and other online resource access will be unavailable the morning of Thursday, October 8, due to scheduled maintenance.

All library locations and services will be closed Thursday, October 8, for a staff development day.

Got a message from noreply@durhamcountylibrary.org saying your library account will expire soon? That is a real message from us - all library accounts now need to be renewed periodically. Learn how to renew your account >

U. S. Patent and Trademark Office

Category: Business and entrepreneurship, Government

Audience: Adults

Access: No card required

Research copyright, patents, and trademarks. Search for U.S. patents, file patents, and check the status of a patent.

Access U. S. Patent and Trademark Office