Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6153989 | Motor driver circuit for driving and decelerating DC motors | Kwong-Tat Chan | 2000-11-28 | |
| 6137329 | Load voltage slew-rate controller | — | 2000-10-24 | |
| 6124689 | Trapezoidal spindle motor driver | — | 2000-09-26 | |
| 5990656 | Frequency detector | — | 1999-11-23 | |
| 5929622 | Balanced current mirror | — | 1999-07-27 | $30,997,000 |
| 5691856 | Apparatus and method for providing selective hysteresis for zero crossings of a disk drive spindle motor | — | 1997-11-25 | $26,085,000 |
| 4581488 | Last number redial device | Robert B. Lawson, Jimmie R. Augustus, Robert Corless | 1986-04-08 | $923,000 |
| 4508939 | Last number redial device | Robert B. Lawson, Jimmie R. Augustus, Robert Corless | 1985-04-02 | $502,000 |
| 4266218 | Alarm system control circuit | — | 1981-05-05 | $715,000 |