Official Gazette of the United States Patent Office USA Patent Office Published: 1912 Total Pages: 1090 Get eBook
The Methods of Glass Blowing and of Working Silica in the Oxy-gas Flame William Ashwell Shenstone Published: 1913 Total Pages: 116 Get eBook
The Canadian Patent Office Record and Register of Copyrights and Trade Marks Published: 1925 Total Pages: 1542 Get eBook
Scientific Canadian Mechanics' Magazine and Patent Office Record Canada. Patent Office Published: 1900 Total Pages: 1476 Get eBook