The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented May 29, 1888

If an object in your hands says PAT. MAY 29, 1888, it may be one of these.

PatentTitleInventorOf
US 383,608COIN-CONTROLLED HEIGHT-MEASURING MACHINE.Charles R. WilliamsNewark, New York

All dates