Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7368654 | Anti-resonant transducer | Yu Hei Sunny Wai | 2008-05-06 |
| 7183842 | Optimum composite cascode amplifier | Yu Hei Sunny Wai | 2007-02-27 |
| 7034218 | Point source contact transducer | Yu Hei Sunny Wai | 2006-04-25 |
| 6822156 | Acoustic guitar under the saddle piezo pickup | Yu Hei Sunny Wai | 2004-11-23 |
| 5022171 | Matrix display assembly having multiple point lighting | Roy Norfolk | 1991-06-11 |
| 4539228 | Method of extending useful life of instrument strings | — | 1985-09-03 |
| 4280018 | Integrated piezoelectric sound transducer and preamplifier | Stuart Weiss | 1981-07-21 |