The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented September 27, 1892

If an object in your hands says PAT. SEPTEMBER 27, 1892, it may be one of these.

PatentTitleInventorOf
US 483,188COIN CONVEYER AND TESTER FOR AUTOMATIC VENDING-MACHINES.John H. VolkmannNew York, New York

All dates