The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented October 22, 1878

If an object in your hands says PAT. OCTOBER 22, 1878, it may be one of these.

PatentTitleInventorOf
US 209,145IMPROVEMENT IN COUNTERFEIT-COIN DETECTERSEdwin StreetSouth Orange, New Jersey

All dates