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USPTO Data Jan 1 1976 - Nov 3 2026
2 Patents
#40 in Leiden
#2,210 in Netherlands
Heerema Marine Contractors
Forward Citations = 12
6 inventors:
Heerema Marine Contractors
Calculating rank
% Expired Patents = 50.0
Forward Citations = 12
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6 inventors (with patents filed for the assignee):
Cornelis Van Zandwijk (1 out of 11 patents)
Cornelis Benard (1 out of 2 patents)
Robert Paul Hovinga (1 out of 1 patent)
4. Walter Petrus Johannes Wassenaar (1 out of 1 patent)
5. Philip Scott (1 out of 2 patents)
6. Rene Broeder (1 out of 2 patents)
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Heerema Marine Contractors. Retrieved from https://idiyas.com/company/heerema-marine-contractors
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]
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]
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]