Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862464 | Data error detector for digital modems using trellis coding | William L. Betts | 1989-08-29 |
| 4833690 | Remote eye pattern display for digital modems | David W. Springer, Chad Balka, William L. Betts | 1989-05-23 |
| 4811357 | Secondary channel for digital modems using spread spectrum subliminal induced modulation | William L. Betts | 1989-03-07 |