The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented February 11, 1902

If an object in your hands says PAT. FEBRUARY 11, 1902, it may be one of these.

PatentTitleInventorOf
US 693,157COIN-CONTROLLED MECHANISM.Alvah C. Roebuck and Frank McMillanChicago, Illinois

All dates