Patented March 20, 1894
If an object in your hands says PAT. MARCH 20, 1894, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 517,012 | MEANS FOR PROTECTING RECEIVING-OPENINGS OF COIN-CONTROLLED MACHINES. | Almy Le Grand Peirce | Cincinnati, Ohio |
The Counterfeit Coin Detector Patent Archive
Every device ever patented to catch a bad coin
If an object in your hands says PAT. MARCH 20, 1894, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 517,012 | MEANS FOR PROTECTING RECEIVING-OPENINGS OF COIN-CONTROLLED MACHINES. | Almy Le Grand Peirce | Cincinnati, Ohio |