The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented February 24, 1880

If an object in your hands says PAT. FEBRUARY 24, 1880, it may be one of these.

PatentTitleInventorOf
US 224,807Counterfeit-Coin Detecter.John A. ThompsonChicago, Illinois

All dates