The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented June 23, 1936

If an object in your hands says PAT. JUNE 23, 1936, it may be one of these.

PatentTitleInventorOf
US 2,044,824COIN DETECTORJohn J. WillisComstock, N. Y.

All dates