Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5892394 | Intelligent bias voltage generating circuit | — | 1999-04-06 |
| 5889853 | Adjustable-period dual-tone multifrequency generator | — | 1999-03-30 |
| 5883530 | Methods and devices for generating cycled waveforms of nonsingle period | — | 1999-03-16 |
| 5859905 | Cycle-modulating type of dual-tone multifrequency generator | Herman Chung | 1999-01-12 |
| 5835581 | Multi-function telephone dialer display | Chern-Jsair Chang | 1998-11-10 |
| 5825859 | Display control device allowing information transmission to both display and dialer | Chi-Yung Wu | 1998-10-20 |
| 5805693 | Monitor-controlling device | Chern-Jsair Chang | 1998-09-08 |
| 5745065 | Level-shift type digital to analog converter | — | 1998-04-28 |
| 5714954 | Waveform-generating apparatus | Herman Chung | 1998-02-03 |