Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5325246 | Automatic tracking method for helical scan magnetic tape recorder using reproduced timing signal to sample two out-of-phase reference signals | Harold V. Clark | 1994-06-28 | $3,823,000 |
| 4868686 | Method and system for recording asynchronous biphase encoded data on a video tape recorder and for recovering the encoded recorded data | Bruce E. Busby | 1989-09-19 | $274,000 |
| 4816723 | Variable speed motor control method and apparatus | Michael B. Shields | 1989-03-28 | $218,000 |
| 4561028 | Apparatus and method for reading and writing data on a magnetic disc | — | 1985-12-24 | $828,000 |
| 4521818 | One plus double omega squared radio frequency equalizer | — | 1985-06-04 | $244,000 |
| 4510459 | Wideband record amplifier | — | 1985-04-09 | $248,000 |
| 4405954 | Radio frequency equalizer | — | 1983-09-20 | $247,000 |
| 4386378 | High gain, current mode preamplifier | — | 1983-05-31 | $406,000 |
| 4383205 | Motor drive amplifier | — | 1983-05-10 | $787,000 |