Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5271390 | Positive pressure breathing assembly and demand regulator therefor | Robert E. Gray, Robert M. Armstrong | 1993-12-21 |
| D336546 | Facepiece | — | 1993-06-15 |
| 5000174 | Positive pressure breathing assembly and demand regulator therefor | Robert E. Gray, Robert M. Armstrong | 1991-03-19 |