Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328858 | Device for absorbing heat from the earth | Henning Richter | 1982-05-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328858 | Device for absorbing heat from the earth | Henning Richter | 1982-05-11 |