Patented March 13, 1900
If an object in your hands says PAT. MARCH 13, 1900, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 645,185 | COIN-DETECTOR | Thomas I. Porter | 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. MARCH 13, 1900, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 645,185 | COIN-DETECTOR | Thomas I. Porter | Chicago, Illinois |