Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36199 | Chemical oxygen generator | Yunchang Zhang | 1999-04-27 |
| 5882545 | Oxygen generating compositions | Yunchang Zhang | 1999-03-16 |
| 5783105 | Oxygen generating compositions | Yunchang Zhang | 1998-07-21 |
| 5338516 | Chemical oxygen generator | Yunchang Zhang | 1994-08-16 |
| 5298187 | Non-toxic chemical oxygen generating compositions | Yunchang Zhang | 1994-03-29 |
| 5279761 | Chemical oxygen generating compositions containing LI202 | Yunchang Zhang | 1994-01-18 |
| 5198147 | Chemical oxygen generator | Yunchang Zhang | 1993-03-30 |
| 4235757 | Ethylene epoxidation catalyst | — | 1980-11-25 |