The Counterfeit Coin Detector Patent Archive

Every device ever patented to catch a bad coin

Patented December 29, 1857

If an object in your hands says PAT. DECEMBER 29, 1857, it may be one of these.

PatentTitleInventorOf
US 18,973BALANCE FOR DETECTING COUNTERFEIT MONEYFerdinand J. HerpersNewark, New Jersey

All dates