Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6321839 | Method of and probe for subsurface exploration | Jurgen Holtenmeier, Uwe Hashagen | 2001-11-27 |
| 6275645 | Method of and apparatus for subsurface exploration | Jurgen Holtkemeier | 2001-08-14 |