The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented March 5, 1935

If an object in your hands says PAT. MARCH 5, 1935, it may be one of these.

PatentTitleInventorOf
US 1,993,465DEVICE FOR REJECTING SPURIOUS COINSCecil H. UnderwoodOakland, California

All dates