The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented November 8, 1898

If an object in your hands says PAT. NOVEMBER 8, 1898, it may be one of these.

PatentTitleInventorOf
US 613,844BOGUS-COIN DETECTOR FOR COIN-OPERATED VENDING-MACHINESMortimer B. MillsChicago, Illinois

All dates