Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11109667 | Device of bi-spiral cleaning brush | Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao | 2021-09-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11109667 | Device of bi-spiral cleaning brush | Chih-An Ku, Tzu-Yen Chuang, Hung-Chieh Chao | 2021-09-07 |