Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7445665 | Method for detecting the cleanliness of a filter | Hung-Jen Wei | 2008-11-04 |
| 7234818 | Dust detection device for air filter and projector utilizing the same | — | 2007-06-26 |