Official Gazette of the United States Patent Office United States. Patent Office Published: 1898-10 Total Pages: 1422 Get eBook
Official Gazette of the United States Patent Office USA Patent Office Published: 1903 Total Pages: 2218 Get eBook
The Canadian Patent Office Record and Register of Copyrights and Trade Marks Published: 1911 Total Pages: 2054 Get eBook
Scientific Canadian Mechanics' Magazine and Patent Office Record Canada. Patent Office Published: 1897 Total Pages: 1474 Get eBook