Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5470227 | Pilot igniter torch with cutoff preheat valves | Roger D. Zwicker | 1995-11-28 |
| 5407348 | Torch with integral flashback arrestors and check valves | Roger D. Zwicker | 1995-04-18 |
| 5392825 | Pressure regulator with a flashback arrestor | Roger D. Zwicker | 1995-02-28 |
| 5390855 | Pilot igniter torch with cutoff preheat valves | Roger D. Zwicker | 1995-02-21 |