Scientific Canadian Mechanics' Magazine and Patent Office Record Canada. Patent Office Published: 1895 Total Pages: 1116 Get eBook
Official Gazette of the United States Patent Office United States. Patent Office Published: 1960 Total Pages: 1314 Get eBook
Official Gazette of the United States Patent Office USA Patent Office Published: 1894 Total Pages: 2352 Get eBook
The Canadian Patent Office Record and Register of Copyrights and Trade Marks Published: 1922 Total Pages: 1410 Get eBook