Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11563589 | Certificate management system and certificate management method | Chi-Yuan Kao, Hung-Chun Chen, Chih-Hsiung Shih | 2023-01-24 |
| 11477038 | Certificate transfer system and certificate transfer method | Chi-Yuan Kao, Hung-Chun Chen, Chih-Hsiung Shih | 2022-10-18 |
| 5562013 | Adjustable bicycle stem | — | 1996-10-08 |
| 5536102 | Locking mechanism for bicycle head tube | — | 1996-07-16 |
| 5400676 | Bicycle handlebar stem mounting device | — | 1995-03-28 |