Patent Search Results
| 1 | 5,878,676 | Burner and furnace operated with at least one burner |
| 2 | 5,833,133 | Microprocessor-controlled semi-automatic temperature control device |
| 3 | 4,920,866 | Anti back draft device for flue |
| 4 | 4,768,444 | Common vent device for positive vent pressure and draft hood equipped gas appliances |
| 5 | 4,512,264 | Induced stack draft apparatus |
| 6 | 4,487,137 | Auxiliary exhaust system |
| 7 | 3,782,303 | DRAFT INDUCER |