Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D930056 | Flat drill bit | Jen-Sheng Liao, Chung-Hung Liao | 2021-09-07 |
| D709111 | Woodworking drill bit | Chung-Hung Liao, Jen-Sheng Liao | 2014-07-15 |
| D687871 | Woodworking drill bit | Chung-Hung Liao, Jen-Sheng Liao | 2013-08-13 |
| D585920 | Woodworking drill bit | Chung-Hung Liao | 2009-02-03 |
| D580462 | Woodworking drill bit | Chung-Hung Liao | 2008-11-11 |