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For the Inventor, By the Inventor

Trondheim, Norway

Electromagnetic Geoservices as


USPTO Granted Patents = 10

% Expired Patents = 50.0



Forward Citations = 134

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15 inventors (with patents filed for the assignee):

goldMedal Svein Ellingsrud (7 out of 19 patents)

silverMedal Terje Eidesmo (5 out of 16 patents)

bronzeMedal Tor Schaug-Pettersen (4 out of 4 patents)

4.  Lasse Amundsen (2 out of 19 patents)

5.  Audun Sodal (2 out of 3 patents)

6.  Hans Rechsteiner (2 out of 2 patents)

7.  Harald Westerdahl (1 out of 22 patents)

8.  Fan-nian Kong (1 out of 18 patents)

9.  Harald Justnes (1 out of 1 patent)

10.  Kare Ingvar Johansen (1 out of 1 patent)

11.  Jan-Aage Langeland (1 out of 1 patent)

12.  Anders Farestveit (1 out of 1 patent)

13.  Sylvia Sandra Pettersen, Legal Representative (1 out of 1 patent)

14.  Stale Johansen (1 out of 3 patents)

15.  Hans Magne Pedersen (1 out of 1 patent)


10 patents:

1. 8228066 - Instrument for measuring electromagnetic signals (2012-07-24),
2. 8188748 - Electromagnetic surveying (2012-05-29),
3. 8075685 - Controlled deterioration of non-reinforced concrete anchors (2011-12-13),
4. 7919965 - Source arrangement and method for generating electromagnetic wavefields (2011-04-05),
5. 7567084 - Method and apparatus for determining the nature of submarine reservoirs (2009-07-28),
6. 7423432 - System and method for electromagnetic wavefield resolution (2008-09-09),
7. 7319330 - System and method for electromagnetic wavefield resolution (2008-01-15),
8. 7202669 - Method and apparatus for determining the nature of subterranean reservoirs (2007-04-10),
9. 7145341 - Method and apparatus for recovering hydrocarbons from subterranean reservoirs (2006-12-05),
10. 7038456 - Method and apparatus for determining the nature of subterranean reservoirs (2006-05-02),
Company Overview
Electromagnetic Geoservices ASA specializes in advanced geophysical services, focusing on the application of electromagnetic technology for subsurface exploration. The company primarily serves the oil and gas industry, providing innovative solutions for resource identification and reservoir management. With a strong emphasis on research and development, Electromagnetic Geoservices is dedicated to enhancing exploration efficiency and accuracy, leveraging its expertise in electromagnetic imaging and data interpretation to support sustainable resource management in various geographic contexts.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

Electromagnetic Geoservices as USPTO Patent Assignee Logo
10 Patents

#14 in Trondheim

#168 in Norway

#56,047 in the World

Trondheim, NO
Trondheim, Norway

Electromagnetic Geoservices as

Forward Citations = 134

15 inventors:

goldMedal Svein Ellingsrud (7 out of 19 patents)

silverMedal Terje Eidesmo (5 out of 16 patents)

bronzeMedal Tor Schaug-Pettersen (4 out of 4 patents)

4.  Lasse Amundsen (2 out of 19 patents)

5.  Audun Sodal (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Electromagnetic Geoservices as. Retrieved from https://idiyas.com/company/electromagnetic-geoservices-as

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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