Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6105632 | Combined pressure reducing and charging valve | — | 2000-08-22 |
| 6102034 | Breathing equipment | — | 2000-08-15 |
| 5813400 | Breathing apparatus | Ivan Hellquist | 1998-09-29 |
| 4887638 | Regulator | Ivan Hellquist | 1989-12-19 |