Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5664566 | Quick-donning full face oxygen mask with inflatable harness and soft foldable lens | Thomas K. McDonald, Gary R. Hannah, Gregory R. Jones | 1997-09-09 |
| 5605145 | Microphone attenuation device for use in oxygen breathing masks | Gary R. Hannah | 1997-02-25 |