Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9097816 | Apparatus for detecting low frequency electromagnetic field responses from a subsurface environment | Hans Jensen, Geir Bjarte Havsgard | 2015-08-04 |
| 8228066 | Instrument for measuring electromagnetic signals | Audun Sodal, Hans Rechsteiner | 2012-07-24 |
| 8075685 | Controlled deterioration of non-reinforced concrete anchors | Audun Sodal, Hans Rechsteiner, Harald Justnes, Kare Ingvar Johansen | 2011-12-13 |
| 7919965 | Source arrangement and method for generating electromagnetic wavefields | Tor Schaug-Pettersen, Terje Eidesmo, Jan-Aage Langeland | 2011-04-05 |
| 7567084 | Method and apparatus for determining the nature of submarine reservoirs | Hans Pedersen, Anders Farestveit, Stale Johansen, Terje Eidesmo | 2009-07-28 |
| 7202669 | Method and apparatus for determining the nature of subterranean reservoirs | Terje Eidesmo, Hans Pedersen, Tor Schaug-Pettersen | 2007-04-10 |
| 7145341 | Method and apparatus for recovering hydrocarbons from subterranean reservoirs | Terje Eidesmo, Fan-Nian Kong, Harald Westerdahl | 2006-12-05 |
| 7038456 | Method and apparatus for determining the nature of subterranean reservoirs | Terje Eidesmo, Tor Schaug-Pettersen | 2006-05-02 |
| 7026819 | Electromagnetic surveying for mapping the content of subterranean reservoirs | Terje Eidesmo, Fan-Nian Kong, Harald Westerdahl, Stale Johansen | 2006-04-11 |
| 6900639 | Electromagnetic method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves | Terje Eidesmo, Harald Westerdahl, Fan-Nian Kong | 2005-05-31 |
| 6864684 | Electromagnetic methods and apparatus for determining the content of subterranean reservoirs | Terje Eidesmo, Harald Westerdahl, Fan-Nian Kong | 2005-03-08 |
| 6859038 | Method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves | Terje Eidesmo, Fan-Nian Kong, Harald Westerdahl | 2005-02-22 |
| 6717411 | Electromagnetic method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves | Terje Eidesmo, Harald Westerdahl, Fan-Nian Kong | 2004-04-06 |
| 6714153 | Device for electromagnetic detection of geological properties in a well | Fan-Nian Kong, Vidar Sten-Halvorsen, Einar Stølen, Harald Westerdahl, Terje Eidesmo | 2004-03-30 |
| 6696839 | Electromagnetic methods and apparatus for determining the content of subterranean reservoirs | Terje Eidesmo, Harald Westerdahl, Fan-Nian Kong | 2004-02-24 |
| 6628119 | Method and apparatus for determining the content of subterranean reservoirs | Terje Eidesmo, Fan-Nian Kong, Harald Westerdahl, Stale Johansen | 2003-09-30 |
| 6556014 | Device and method for measurement by guided waves on a metal string in a well | Fan-Nian Kong, Harald Westerdahl, Terje Eidesmo | 2003-04-29 |
| 6525540 | Method and device for detection of em waves in a well | Fan-Nian Kong, Harald Westerdahl, Terje Eidesmo | 2003-02-25 |
| 6480000 | Device and method for measurement of resistivity outside of a wellpipe | Fan-Nian Kong, Harald Westerdahl, Terje Eidesmo | 2002-11-12 |