Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10100862 | Simple engaging device | — | 2018-10-16 |
| 9097274 | Screws with function of screwdriver | — | 2015-08-04 |
| 6371688 | Manhole cover mounting structure | Chih-Cheng Yang, CHI-CHIH YANG | 2002-04-16 |