The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented September 6, 1853

If an object in your hands says PAT. SEPTEMBER 6, 1853, it may be one of these.

PatentTitleInventorOf
US 9,997COUNTERFEIT-COIN DETECTOR.Gideon B. SmithBaltimore, Maryland

All dates