Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6212896 | Heat transfer column for geothermal heat pumps | — | 2001-04-10 |
| 5758514 | Geothermal heat pump system | Frank Carpenter | 1998-06-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6212896 | Heat transfer column for geothermal heat pumps | — | 2001-04-10 |
| 5758514 | Geothermal heat pump system | Frank Carpenter | 1998-06-02 |