Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11156383 | High efficiency heater with condensate collection and humidification | David M. Christensen, Scott G. Schulte | 2021-10-26 |
| 10072872 | High efficiency heater with condensate collection and humidification | David M. Christensen, Scott G. Schulte | 2018-09-11 |
| 9062881 | Control system for space heater/hearth | Frank D. Wurth, David M. Christensen | 2015-06-23 |