Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6891495 | Analog-to-digital converter | Po-Jen Huang, Hung-Yih Lin, Cheng Wang | 2005-05-10 |
| 5983461 | Structure of supporter for tie knot of knotting-free necktie | — | 1999-11-16 |
| 5952885 | Current-to-voltage converter with highpass filter function | Chien-Ping Wu, Chang-Da Tsai | 1999-09-14 |
| 4897887 | Preknotted adjustable necktie | Ching-Hwa Chen | 1990-02-06 |
| 4856114 | Seaman style preset necktie | Ching-Hwa Chen | 1989-08-15 |
| 4835794 | Preset necktie | Ching-Hwa Chen | 1989-06-06 |
| 4513453 | Pre-tied necktie | Ching-Hwa Chen | 1985-04-30 |