The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented November 29, 1887

If an object in your hands says PAT. NOVEMBER 29, 1887, it may be one of these.

PatentTitleInventorOf
US 374,049COIN-OPERATED MACHINE FOR TESTING MUSCULAR POWER.Percival EverittLondon

All dates