Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11041721 | Compass device | Chiao-Hu Chang, Wen-Ching Chang | 2021-06-22 |
| 8640351 | Multifunction measuring device | — | 2014-02-04 |
| D679612 | Measuring instrument | — | 2013-04-09 |
| D674296 | Compass | — | 2013-01-15 |
| D661604 | Compass | — | 2012-06-12 |
| D658521 | Combined compass and casing | — | 2012-05-01 |
| D547062 | Name card holder | — | 2007-07-24 |