Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6064125 | Uninterruptible power supply unit | David W. Weisman | 2000-05-16 |
| 5912514 | Uninterruptible power supply unit | David W. Weisman | 1999-06-15 |
| 5556283 | Card type of electronic learning aid/teaching apparatus | David W. Weisman | 1996-09-17 |
| 4549179 | Apparatus for remote control of volume and power on electronic equipment possessing an audio output | — | 1985-10-22 |