The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented March 17, 1936

If an object in your hands says PAT. MARCH 17, 1936, it may be one of these.

PatentTitleInventorOf
US 2,034,431SLUG ELIMINATOR FOR COIN OPERATED MECHANISMSRussell J. HallDenver, Colorado

All dates