The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented October 4, 1898

If an object in your hands says PAT. OCTOBER 4, 1898, it may be one of these.

PatentTitleInventorOf
US 611,825COIN-TESTER FOR COIN-CONTROLLED APPARATUS.John H. VolkmannNew York, New York

All dates