Patented May 4, 1909
If an object in your hands says PAT. MAY 4, 1909, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 920,697 | SPURIOUS-COIN DETECTOR FOR VENDING-MACHINES. | Leslie A. Vandiver | Chicago, Illinois |
The Counterfeit Coin Detector Patent Archive
Every device ever patented to catch a bad coin
If an object in your hands says PAT. MAY 4, 1909, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 920,697 | SPURIOUS-COIN DETECTOR FOR VENDING-MACHINES. | Leslie A. Vandiver | Chicago, Illinois |