Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6866481 | Ventilator having an optimum fan structure | Chao-Cheng Chiang | 2005-03-15 |
| 6844691 | Ventilator having an abnormal operation indication device | Chao-Cheng Chiang | 2005-01-18 |
| 6794843 | Ventilator having a muting device | Chao-Cheng Chiang | 2004-09-21 |
| 5323762 | Automatic cleaning device of smoke exhauster | Chao-Cheng Chiang | 1994-06-28 |