Alphabetical Index to the Classification of German Patents Germany. Reichspatentamt Published: 1919 Total Pages: 146 Get eBook
The German Patents on Gas Turbine Plants United States. Navy Department. Bureau of Ships Published: 1943 Total Pages: 186 Get eBook
Official Gazette of the United States Patent Office United States. Patent Office Published: 1967 Total Pages: 2494 Get eBook
The United States Catalog Supplement, January 1918-June 1921 Eleanor E. Hawkins Published: 1921 Total Pages: 1190 Get eBook
Cumulative Title Index to United States Public Documents, 1789-1976 Sandra K. Faull Published: 1979 Total Pages: 608 Get eBook
