Available only in the Central Denver Public Library


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, Floor 3. Call 720-865-1363 for more information or to make an appointment. More information.

Archives Collection

Comprises material on the American West, particularly Colorado and the Rocky Mountain Region and on the twentieth-century environmental conservation movement in the United States. Housed in the Western History & Genealogy Department.