Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D291566 | Retrofittable card reader and carrier select keyboard unit for paystation telephones | Joseph C. Perry, Donald E. Spears, II | 1987-08-25 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D291566 | Retrofittable card reader and carrier select keyboard unit for paystation telephones | Joseph C. Perry, Donald E. Spears, II | 1987-08-25 |