Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5473910 | Apparatus and method for exhaust gas dispersion and condensate removal for gas engine driven heat pumps | Scott N. Danhof | 1995-12-12 |
| 5435485 | Automatic purge system for gas engine heat pump | — | 1995-07-25 |
| 5363673 | Simplified engine coolant system for gas engine heat pump | Douglas E. Boyd | 1994-11-15 |
| 5249742 | Coolant circulation system for engine heat pump | Douglas E. Boyd, Jan B. Yates, Lee Richard Van Dixhorn | 1993-10-05 |
| 4641027 | Indicating positions | G. Frederick Renner, Richard K. Thatcher, Jeremy M. Harris, Nile F. Hartman, Robert B. McCown | 1987-02-03 |