The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented December 12, 1899

If an object in your hands says PAT. DECEMBER 12, 1899, it may be one of these.

PatentTitleInventorOf
US 638,967EJECTOR FOR COIN-DETECTORS FOR MONEY-CONTROLLED MACHINES.Otto Jaeger and Alexander JaegerPhiladelphia, Pennsylvania
US 639,115COIN-GUARD OR CONTROLLING DEVICE FOR COIN-OPERATED MACHINES.Robert Fred. TochtermannNew York, New York

All dates