The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented February 12, 1929

If an object in your hands says PAT. FEBRUARY 12, 1929, it may be one of these.

PatentTitleInventorOf
US 1,701,875COIN-CONTROLLED MECHANISMArthur H. Du GrenierHaverhill, Massachusetts

All dates