The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented April 30, 1907

If an object in your hands says PAT. APRIL 30, 1907, it may be one of these.

PatentTitleInventorOf
US 852,111FRAUD-PREVENTIVE DEVICE FOR COIN MECHANISMS.John FritschePhiladelphia, Pennsylvania

All dates