The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented December 17, 1901

If an object in your hands says PAT. DECEMBER 17, 1901, it may be one of these.

PatentTitleInventorOf
US 688,839APPARATUS FOR DISTINGUISHING GENUINE FROM SPURIOUS COINSJohn E. Evard

All dates