Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6076862 | Concentric snap-together direct vent structure and associated fabrication methods | Gerry Smith | 2000-06-20 |
| 6039041 | Methods of fabricating a vent/intake system for a fuel-fired, direct vent heating appliance | — | 2000-03-21 |
| 5655514 | Fuel-fired fireplace insert with integral combination draft hood and heat exchanger structure | Glenn W. Kowald | 1997-08-12 |
| 5393260 | Flexible double wall vent pipe | — | 1995-02-28 |
| 5328213 | Adjustable pipe fitting | — | 1994-07-12 |
| 5320520 | Gas burner assembly for simulating a natural log fire | Glenn W. Kowald | 1994-06-14 |
| 4386731 | Damper construction for a gas fired combustion apparatus | — | 1983-06-07 |
| 4289271 | Damper construction for a gas fired combustion apparatus | — | 1981-09-15 |
| 4225080 | Damper construction for a gas fired combustion apparatus | — | 1980-09-30 |