Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D924405 | Portable oxygen device | David E. Cowan | 2021-07-06 |
| 10926113 | Portable chemical oxygen generator | David E. Cowan | 2021-02-23 |
| 10556135 | Portable chemical oxygen generator | David E. Cowan | 2020-02-11 |
| 10039942 | Portable chemical oxygen generator | David E. Cowan | 2018-08-07 |
| 9849312 | Portable chemical oxygen generator | David E. Cowan | 2017-12-26 |
| 8147760 | Portable chemical oxygen generator | Gary S. Huvard, Kevin R. Ward | 2012-04-03 |
| 4214593 | Esophageal pressure monitoring device | Nelson E. Leatherman | 1980-07-29 |