Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866647 | Continuously variable digital delay circuit | — | 1989-09-12 |
| 4843581 | Digital signal processor architecture | Robert L. Cupo | 1989-06-27 |
| 4825459 | Local loop test arrangement in an echo canceller based full duplex modem | William Edward Keasler, Jr., Joseph Maruscsak, David G. Shaw | 1989-04-25 |
| 4815103 | Equalizer-based timing recovery | Robert L. Cupo | 1989-03-21 |