J H Ferguson

John H Ferguson received patent number 975,609 for his Gem Motor Wrench on February 26, 1910. Advertising appeared in 1914 in Gas Review magazine. Smaller ads in 1917 Popular Mechanics solicited agents. The wrench is stamped Nov. 15, 10 and does not have the swivel jaw in the patent image.
Return to Home Page                          YouTube channel Wrenchwiki