The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented October 31, 1876

If an object in your hands says PAT. OCTOBER 31, 1876, it may be one of these.

PatentTitleInventorOf
US 183,833IMPROVEMENT IN COIN-COUNTERSAron BernsteinBerlin, Prussia

All dates