Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6050261 | Combination backframe and self contained breathing apparatus | R. David Lewis, Robert E. Gray, Donald W. Dawson | 2000-04-18 |
| 6032664 | Pressure display for self contained breathing apparatus | Robert E. Gray, R. David Lewis, Victor Speck | 2000-03-07 |
| 5909179 | Automatic reset for personal alert safety system | — | 1999-06-01 |
| 5640148 | Dual activation alarm system | R. David Lewis, Robert E. Gray, Bruce A. Hefner | 1997-06-17 |
| 4713735 | Flashlight for use in vehicles | — | 1987-12-15 |