Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6694766 | Power generation systems with earth heat transfer | Gregory Tinkler | 2004-02-24 |
| 6672371 | Earth heat exchange system | Thomas R. Amerman | 2004-01-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6694766 | Power generation systems with earth heat transfer | Gregory Tinkler | 2004-02-24 |
| 6672371 | Earth heat exchange system | Thomas R. Amerman | 2004-01-06 |