Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5408232 | Traffic signal device with interchangeable lamps | Rung-Ywan Tsai, Chaur-Tsang Wei, Chii-Hua Lee | 1995-04-18 |
| 5398133 | High endurance near-infrared optical window | Rung-Ywan Tsai | 1995-03-14 |
| 5009486 | Form depicting, optical interference authenticating device | Jerzy A. Dobrowolski, Allan J. Waldorf | 1991-04-23 |