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For the Inventor, By the Inventor

Zwijndrecht, Belgium

Dredging International N.v.


USPTO Granted Patents = 10

% Expired Patents = 70.0


Forward Citations = 17

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9 inventors (with patents filed for the assignee):

goldMedal Etienne Clymans (3 out of 6 patents)

silverMedal Bruno Tack (3 out of 5 patents)

bronzeMedal Luk Verstraelen (2 out of 3 patents)

4.  Lucien Halleux (2 out of 2 patents)

5.  Klaas Geert Wijma (1 out of 7 patents)

6.  Stijn Claessens (1 out of 1 patent)

7.  Stefaan Vandycke (1 out of 2 patents)

8.  Ronald W Van Oostrum (1 out of 1 patent)

9.  Philip L Hermans (1 out of 1 patent)

10.  Marc Van Den Broeck (0 patent)

11.  Bart Peter Verboomen (0 patent)

12.  Thibo Marc Lodewyckx (0 patent)

13.  Fabien Albrecht Donze (0 patent)

14.  Merel Nicole Roberta Kroeders (0 patent)

15.  Matthias Lodewijk Elias Brendaad Van Der Hoeven (0 patent)


10 patents:

1. 9476181 - Drag head for a trailing suction hopper dredger and method for dredging using this drag head (2016-10-25),
2. 9115480 - Cutter head for dredging ground and method for dredging using this cutter head (2015-08-25),
3. 8732991 - Cutter head for dredging ground and use of this cutter head for dredging ground (2014-05-27),
4. 8555531 - System and method for optimizing dredging (2013-10-15),
5. 8286375 - Drag head of a trailing suction hopper dredger and method for dredging using this drag head (2012-10-16),
6. 8146274 - Method and system for optimizing dredging (2012-04-03),
7. 7900381 - Apparatus with flexibly mounted spud carriage (2011-03-08),
8. 7793441 - Device and method for changing a suction mouth (2010-09-14),
9. 7694441 - Device and method for dislodging and recovering dredging material of varying nature (2010-04-13),
10. 5915885 - Method for vertical displacement of masses underneath the earth's surface (1999-06-29),
Company Overview
Dredging International N.V., based in Zwijndrecht, Belgium, specializes in dredging and marine engineering services. The company focuses on the development and execution of projects related to the maintenance and construction of ports, waterways, and coastal areas. With expertise in hydraulic engineering, it employs advanced technologies to optimize dredging operations and ensure environmental sustainability. Dredging International is recognized for its commitment to innovation and efficiency in the maritime sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

10 Patents

#2 in Zwijndrecht

#255 in Belgium

#56,047 in the World

Zwijndrecht, BE
Zwijndrecht, Belgium

Dredging International N.v.

Forward Citations = 17

9 inventors:

goldMedal Etienne Clymans (3 out of 6 patents)

silverMedal Bruno Tack (3 out of 5 patents)

bronzeMedal Luk Verstraelen (2 out of 3 patents)

4.  Lucien Halleux (2 out of 2 patents)

5.  Klaas Geert Wijma (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dredging International N.v.. Retrieved from https://idiyas.com/company/dredging-international-n-v

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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