Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048546 | Filter and method of treating tobacco smoke to reduce materials harmful to health | Chi-Hsueh Hsu, Shien-Yu Chuang, David Yue-Weilee | 1991-09-17 |
| 5016625 | Full head respirator | Chi-Hsueh Hsu, Shien-Yu Chuang | 1991-05-21 |