Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4524435 | Method for determining the degree of change of material properties of underground strata | Klaus Helbig | 1985-06-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4524435 | Method for determining the degree of change of material properties of underground strata | Klaus Helbig | 1985-06-18 |