Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5046086 | Page-mapped multi-line telephone communication system | Thomas R. Kelly, Edward J. Mazeiko, Jr., Wellseley Smith | 1991-09-03 |
| 4536621 | Dual talk path key telephone | Sedat Zaimi, Vincenzo Castellano, Irwin Schildkraut | 1985-08-20 |