Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4576616 | Method and apparatus for concentrating oxygen | Gene A. Fisher, Louis Feierabend | 1986-03-18 |
| 4502873 | Method and apparatus for concentrating oxygen | Gene A. Fisher, Louis Feierabend | 1985-03-05 |