Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5988526 | Combination nozzle and vacuum hood that is self cleaning | Chung-Hao Tzeng, Dong-Shiuh Cheng, Yung-Kai Lin | 1999-11-23 |
| 5756155 | Combination nozzle and vacuum hood that is self cleaning | Chung-Hao Tzeng, Dong-Shiuh Cheng, Yung-Kai Lin | 1998-05-26 |