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For the Inventor, By the Inventor

Straume, Norway

Agr Subsea, as


USPTO Granted Patents = 17

% Expired Patents = 58.8



Trademarks = 2

Forward Citations = 108

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11 inventors (with patents filed for the assignee):

goldMedal Roger Sverre Stave (6 out of 13 patents)

silverMedal Sigurd Ree (5 out of 7 patents)

bronzeMedal John H Cohen (3 out of 18 patents)

4.  Bernt Eikemo (2 out of 2 patents)

5.  Anders Arefjord (1 out of 7 patents)

6.  Arvid Iversen (1 out of 2 patents)

7.  Mehdi M Rajabi (1 out of 1 patent)

8.  Bjorn Rohde (1 out of 1 patent)

9.  Mehdi Mir Rajabi (1 out of 1 patent)

10.  Jon Arne Hammersmark (1 out of 1 patent)

11.  Emil Richard Talamo (1 out of 3 patents)

12.  Roger Stave (1 patent)

13.  Anders Mathias Arefjord (0 patent)


17 patents:

1. 9322232 - System and method for inhibiting an explosive atmosphere in open riser subsea mud return drilling systems (2016-04-26),
2. 9322230 - Direct drive fluid pump for subsea mudlift pump drilling systems (2016-04-26),
3. 9068420 - Device and method for controlling return flow from a bore hole (2015-06-30),
4. 9057233 - Boost system and method for dual gradient drilling (2015-06-16),
5. 9038732 - Method and device for riserless drilling fluid recovery (2015-05-26),
6. 8967292 - Method and device for establishing a borehole in the seabed (2015-03-03),
7. 8851181 - Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore (2014-10-07),
8. 8613608 - Progressive cavity pump having an inner rotor, an outer rotor, and transition end piece (2013-12-24),
9. 8585893 - Particle collector with weight measuring (2013-11-19),
10. 8556603 - Progressing cavity pump adapted for pumping of compressible fluids (2013-10-15),
11. 8496456 - Progressive cavity pump including inner and outer rotors and a wheel gear maintaining an interrelated speed ratio (2013-07-30),
12. 8413722 - Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore (2013-04-09),
13. 8388327 - Progressing cavity pump with several pump sections (2013-03-05),
14. 8087466 - Centralization and running tool and method (2012-01-03),
15. 7958948 - Method and system for return of drilling fluid (2011-06-14),
Company Overview
Agr Subsea, based in Straume, Norway, specializes in providing advanced subsea solutions for the oil and gas industry. The company focuses on developing innovative technologies and services that enhance the efficiency and safety of underwater operations. With expertise in subsea engineering, inspection, and maintenance, Agr Subsea is committed to delivering high-quality solutions that meet the evolving needs of its clients in challenging marine environments. Their work supports sustainable practices in offshore resource management.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

17 Patents

#2 in Straume

#92 in Norway

#35,948 in the World

Straume, NO
Straume, Norway

Agr Subsea, as

Forward Citations = 108

11 inventors:

goldMedal Roger Sverre Stave (6 out of 13 patents)

silverMedal Sigurd Ree (5 out of 7 patents)

bronzeMedal John H Cohen (3 out of 18 patents)

4.  Bernt Eikemo (2 out of 2 patents)

5.  Anders Arefjord (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Agr Subsea, as. Retrieved from https://idiyas.com/company/agr-subsea-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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