Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5209655 | Heat exchanger system, fuel control system therefor, and methods of making the same | — | 1993-05-11 |
| 5158447 | Primary gas furnace control | — | 1992-10-27 |
| 5141431 | Heat exchanger system, fuel control system therefor | — | 1992-08-25 |
| 5085573 | Hot surface ignition system for a gas furnace, control device therefor and methods of making the same | — | 1992-02-04 |
| 5003161 | Combination of an igniter for a gas furnace and a control unit therefor | — | 1991-03-26 |
| 4997361 | Hot surface direct ignition system for gas furnaces | — | 1991-03-05 |
| 4976605 | Hot surface ignition system for a gas furnace, control device therefor and methods of making the same | — | 1990-12-11 |
| 4971549 | Fuel control unit for a gas furnace and method of making the same | — | 1990-11-20 |
| 4935606 | Method of operating gas furnace igniter | — | 1990-06-19 |
| 4915614 | Primary gas furnace control | — | 1990-04-10 |
| 4865539 | Fuel control unit for a gas furnace and method of making the same | — | 1989-09-12 |
| 4856983 | Hot surface direct ignition system for gas furnaces | — | 1989-08-15 |
| 4836770 | Primary gas furnace control | — | 1989-06-06 |
| 4809128 | Heating element operating unit and method | — | 1989-02-28 |
| 4755132 | Hot surface ignition system for a gas furnace and method of making the same | — | 1988-07-05 |
| 4755133 | Primary gas furnace control | — | 1988-07-05 |
| 4746284 | Hot surface direct ignition system for gas furnaces | — | 1988-05-24 |
| 4711628 | Hot surface ignition system for a gas furnace and method of making the same | — | 1987-12-08 |
| 4680005 | Primary gas furnace control | — | 1987-07-14 |
| 4643668 | Hot surface direct ignition system for gas furnaces | — | 1987-02-17 |
| 4626192 | Primary gas furnace control | — | 1986-12-02 |
| 4535380 | Ignition system | — | 1985-08-13 |
| 4278419 | Primary oil burner safety control and intermittent ignition system | Jon H. Bechtel | 1981-07-14 |