Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6463926 | Direct vent fireplace with baffled, directional exhaust and vent air column | Christopher L. Flick, David M. Christensen, Robert B. Zahm | 2002-10-15 |
| 6003507 | Gas heater having firebox with controllable outside air mixing vent | Christopher L. Flick | 1999-12-21 |