Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998271 | Telephone accessory | Angelo Tortola, Donald C. Miffitt | 1991-03-05 |
| 4957291 | Electronic puzzle | Donald C. Miffitt, Angelo Tortola, Robert L. Halliday | 1990-09-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4998271 | Telephone accessory | Angelo Tortola, Donald C. Miffitt | 1991-03-05 |
| 4957291 | Electronic puzzle | Donald C. Miffitt, Angelo Tortola, Robert L. Halliday | 1990-09-18 |