Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6138813 | Coin mechanism with a piezoelectric film sensor | Robert C. Lamb, William C. Wolffe, Robert Speers | 2000-10-31 |
| 5949863 | Coin operated telephone auditor | — | 1999-09-07 |
| 5915517 | Coin diverter | — | 1999-06-29 |
| 5896446 | Coin operated telephone auditor | Cary Sagady, Robert C. Lamb, Michael S. Zemanik | 1999-04-20 |
| 4928299 | Coin operated telephone operation monitoring switch mounting arrangement | Edward F. Lagan, Jr., Patrick J. McGarry | 1990-05-22 |