The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented May 2, 1933

If an object in your hands says PAT. MAY 2, 1933, it may be one of these.

PatentTitleInventorOf
US 1,907,064COIN SELECTING APPARATUSJohn GottfriedBrooklyn, New York

All dates