Use the database the U.S. Patent & Trademark Office's Patent Examiners use. Available only at the Denver Public Library's Reference Department at the Central Library, Level 3. Call 720-865-1363 for more information or to make an appointment. More information.
All DPL locations will be closed November 27, and will close at 4 p.m. November 26. The Westwood Branch Library will be closed November 27-30. More...