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 close early at 4 p.m. Nov. 25, closed all day Nov. 26. Westwood closed Nov. 26-29. More...