% Expired Patents = 12.5

CIPO Patents = 1

EPO Patents = 4

Forward Citations = 26

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4 inventors (with patents filed for the assignee):

Harald Syse (7 out of 15 patents)

Jostein Aleksandersen (7 out of 8 patents)

John Helvik (1 out of 2 patents)

4. Jone Mellemstrand (1 out of 3 patents)

5. Khanh Van Nguyen (3 patents)

6. Cody A Parsley (4 patents)

7. Paul J H Christie (1 patent)

8. Rafal Sulwinski (1 patent)

9. Kurt Steinsvik (1 patent)

8 patents: Sort by Forward Citations

1. 8171960 - Plug with gripping means (2012-05-08),

2. 8042574 - Plug with expandable packer element (2011-10-25),

3. 7909065 - Pre-tensioned sealing means arrangement (2011-03-22),

4. 7878221 - Smartplug with wheel centralizer (2011-02-01),

5. 7857356 - Smartcoupling—non responsive (2010-12-28),

6. 7766046 - Plugging system for use during an offshore pipeline laying operation (2010-08-03),

7. 7568504 - Hydraulic cylinders and plug with hydraulic cylinder (2009-08-04),

8. 7210503 - Method and device for increasing safety during pipelaying (2007-05-01),

Company Overview

TDW Offshore Services AS is a leading provider of offshore services for the oil and gas industry. With a strong focus on safety and efficiency, we offer a wide range of solutions including pipeline services, engineering, and maintenance. Our experienced team of professionals is dedicated to delivering high-quality services that meet the needs of our clients. Visit our website to learn more about how we can support your offshore operations.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

8 Patents

#19 in Stavanger

#216 in Norway

Stavanger, Norway

Tdw Offshore Services as

Forward Citations = 26

4 inventors:

Harald Syse (7 out of 15 patents)

Jostein Aleksandersen (7 out of 8 patents)

John Helvik (1 out of 2 patents)

4. Jone Mellemstrand (1 out of 3 patents)

5. Khanh Van Nguyen (3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tdw Offshore Services as. Retrieved from https://idiyas.com/company/tdw-offshore-services-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]

1 patent (CIPO):

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]

4 patents (EPO):

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]