Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7293718 | Variable output heating and cooling control | Ralph H. Torborg, James W. Ratz, Larry Lutton | 2007-11-13 |
| 6866202 | Variable output heating and cooling control | Ralph H. Torborg, James W. Ratz, Larry Lutton | 2005-03-15 |
| 6864659 | Variable speed controller for air moving applications using an AC induction motor | James W. Ratz, Larry Lutton, Nickolas G. Vrionis | 2005-03-08 |
| 6404342 | Flame detector using filtering of ultraviolet radiation flicker | Norman G. Planer | 2002-06-11 |
| 5365223 | Fail-safe condition sensing circuit | — | 1994-11-15 |
| 5236328 | Optical flame detector performance tester | George J. Tate | 1993-08-17 |
| 5227639 | Infrared-based sensing circuit providing an output simulating the output of a flame rod sensor | — | 1993-07-13 |