The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented September 11, 1888

If an object in your hands says PAT. SEPTEMBER 11, 1888, it may be one of these.

PatentTitleInventorOf
US 389,223COIN-CONTROLLED WEIGHING-SCALEGeorge P. Hill and Albert L. WashburnNiantic, Connecticut

All dates