Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805172 | Time division multiplex (TDM) switching system especially for pulse code modulated (PCM) telephony signals | Bruce G. Littlefield | 1989-02-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805172 | Time division multiplex (TDM) switching system especially for pulse code modulated (PCM) telephony signals | Bruce G. Littlefield | 1989-02-14 |