Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668870 | Audible signaling device for informing when a telephone line is available or in use | — | 1997-09-16 |
| 4744103 | Computer controlled multi-link communication system | Peter Holtermann, Carl P. Rau | 1988-05-10 |
| 4387420 | Programmable clock | Dilip T. Singhi | 1983-06-07 |