Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689962 | Heat pump systems and methods incorporating subcoolers for conditioning air | — | 1997-11-25 |
| 5680898 | Heat pump and air conditioning system incorporating thermal storage | David Phillips, Joseph A. Gustin | 1997-10-28 |