Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903294 | Low voltage operated coin relay | Gary Grantland | 1990-02-20 |
| 4896348 | Paystation monitor circuit to prevent fraudulent use | Gary Grantland | 1990-01-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903294 | Low voltage operated coin relay | Gary Grantland | 1990-02-20 |
| 4896348 | Paystation monitor circuit to prevent fraudulent use | Gary Grantland | 1990-01-23 |