Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5829431 | Microphone attenuation device for use in oxygen breathing masks | Randy G. Stratman | 1998-11-03 |
| 5664566 | Quick-donning full face oxygen mask with inflatable harness and soft foldable lens | Thomas K. McDonald, Randy G. Stratman, Gregory R. Jones | 1997-09-09 |
| 5605145 | Microphone attenuation device for use in oxygen breathing masks | Randy G. Stratman | 1997-02-25 |