Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4518345 | Direct ignition gas burner control system | John S. Haefner | 1985-05-21 |
| 4444551 | Direct ignition gas burner control system | Bernard T. Brown, Dennis M. Rippelmeyer, John S. Haefner | 1984-04-24 |