Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8026723 | Multi-component marine electromagnetic signal acquisition method | Joern Olaf Loehken, Stefan L. Helwig, Tilman Hanstein | 2011-09-27 |
| 7872477 | Multi-component marine electromagnetic signal acquisition cable and system | Stefan L. Helwig | 2011-01-18 |