Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5313519 | Protected telephone network interface device | N. Peter Mickelson, John J. Napiorkowski | 1994-05-17 |
| 5153910 | Protected telephone network interface device | N. Peter Mickelson, John J. Napiorkowski | 1992-10-06 |