Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11109667 | Device of bi-spiral cleaning brush | Tzu-Yen Chuang, Hung-Chieh Chao, Fu-Qiang Zhang | 2021-09-07 |
| 10758946 | Device of cleaning brush | Tzu-Yen Chuang, Hung-Chieh Chao | 2020-09-01 |
| 8950032 | Cleaning cylinder apparatus | Tung-Chung Cheng, Hung-Chia Chen, Jung-Pin Mao | 2015-02-10 |