Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6240190 | Synchronized sounding/flashing circuit | — | 2001-05-29 |
| 5784475 | Stable sound synthesizing circuit | Yu-Chih Lin, Tsung-Min Chen | 1998-07-21 |
| 5633941 | Centrally controlled voice synthesizer | — | 1997-05-27 |
| 5631647 | Analog multiplying type of digital/analog converter circuit | — | 1997-05-20 |