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For the Inventor, By the Inventor

Lohmar, Germany

Gkn Viscodrive Gmbh


USPTO Granted Patents = 41

% Expired Patents = 22.0

Forward Citations = 319

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18 inventors (with patents filed for the assignee):

goldMedal Georg Kwoka (11 out of 12 patents)

silverMedal Adrian Chludek (9 out of 19 patents)

bronzeMedal Theodor Gassmann (7 out of 63 patents)

4.  Heinz Madsack (4 out of 4 patents)

5.  Makoto Hagiwara (3 out of 3 patents)

6.  Nikolaus Mayr (2 out of 2 patents)

7.  Horst Görlich (2 out of 2 patents)

8.  Manfred Hofer (2 out of 2 patents)

9.  Manfred Hofer (2 out of 2 patents)

10.  Fred Kramer (1 out of 4 patents)

11.  Bernd Constantin (1 out of 3 patents)

12.  Christian Gasch (1 out of 5 patents)

13.  Herbert Taureg (1 out of 17 patents)

14.  Michael Höck (1 out of 2 patents)

15.  Paul-Erich Schönenbrücher (1 out of 1 patent)


Core Competencies:
Viscous Coupling
Differential Drive
Torque Transmission
Mechanical Clutch
Controllable Coupling
Axial Adjusting Device
Shear Control
Friction Coupling
Braking Stability
Dampening Device
Shaft Coupling
Coupling Assembly

41 patents:

1. 7252017 - Axial adjusting device with multiple ball means (2007-08-07),
2. 6874605 - Controllable viscous coupling (2005-04-05),
3. 6866131 - Controllable viscous coupling (2005-03-15),
4. 6845854 - Axial setting device (2005-01-25),
5. 6668993 - Viscous coupling (2003-12-30),
6. 6616566 - Differential drive (2003-09-09),
7. 6581741 - Axial setting device (2003-06-24),
8. 6578693 - Axial setting device (2003-06-17),
9. 6484859 - Shaft coupling with a dampening device (2002-11-26),
10. 6446773 - Viscous coupling with symmetric freewheeling assembly (2002-09-10),
11. 6443282 - Apparatus and method for controllable viscous coupling (2002-09-03),
12. 6394246 - Twin-coupling with improved braking stability and less torsion (2002-05-28),
13. 6342025 - Differential drive (2002-01-29),
14. 6299538 - Differential-speed-controlled transmitting coupling (2001-10-09),
15. 6296095 - Coupling assembly with double shear channel (2001-10-02),
Company Overview
Gkn Viscodrive Gmbh, located in Lohmar, Germany, specializes in advanced torque transmission technologies, focusing on controllable viscous coupling systems. The company develops innovative solutions for differential drives, mechanical clutches, and shaft couplings, enhancing braking stability and performance in various applications. With a commitment to engineering excellence, Gkn Viscodrive plays a crucial role in the automotive and industrial sectors, providing reliable components that optimize vehicle dynamics and operational efficiency.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

41 Patents

#7 in Lohmar

#1,246 in Germany

#16,706 in the World

Lohmar, DE
Lohmar, Germany

Gkn Viscodrive Gmbh

Forward Citations = 319

18 inventors:

goldMedal Georg Kwoka (11 out of 12 patents)

silverMedal Adrian Chludek (9 out of 19 patents)

bronzeMedal Theodor Gassmann (7 out of 63 patents)

4.  Heinz Madsack (4 out of 4 patents)

5.  Makoto Hagiwara (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gkn Viscodrive Gmbh. Retrieved from https://idiyas.com/company/gkn-viscodrive

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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