Rural America a century ago

Rules Of Practice In The U.s. Patent Office

Classification Of Subjects Of Invention Of The United States Patent Office, Arranged By Divisions With Classes And Subclasses In Each

Official gazette of the United States Patent Office

The Law of Patents, Trade-Marks, Labels and Copy-Rights

Annual Report of the Commissioner of Patents, Volume 3

Official Gazette Of The United States Patent Office, Volume 274

Specifications And Drawings Of Patents Relating To Electricity Issued By The U. S., Volume 64

Annual Report Of The Commissioner Of Patents, Volume 1

Official Gazette Of The United States Patent Office, Volume 158

Report Of The Commissioner Of Patents, Volume 1