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For the Inventor, By the Inventor

Plymouth, MI, United States of America

Freudenberg-Nok General Partnership


USPTO Granted Patents = 227

% Expired Patents = 19.8



Trademarks = 22

Forward Citations = 1,763

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163 inventors (with patents filed for the assignee):

goldMedal Edward Hosung Park (26 out of 26 patents)

silverMedal Alexander Berdichevsky (22 out of 22 patents)

bronzeMedal John C Dahlheimer (15 out of 16 patents)

4.  David Sakata (11 out of 11 patents)

5.  Francis Joseph Walker (11 out of 12 patents)

6.  John A London (9 out of 9 patents)

7.  Paul J Hochgesang (8 out of 8 patents)

8.  John B Wagner (8 out of 9 patents)

9.  Raymond Lee Szparagowski (7 out of 7 patents)

10.  Mickey L Love (6 out of 10 patents)

11.  Patrick L Scheib (6 out of 6 patents)

12.  David E Johnston (6 out of 6 patents)

13.  Robert P Laplante (5 out of 5 patents)

14.  Keith Clark (5 out of 5 patents)

15.  Saikrishna Sundararaman (5 out of 5 patents)


Core Competencies:
Seal Design
Contaminant Exclusion
Dynamic Seal
Valve Stem Seal
Radial Shaft Seal
Elastomers
Gasket Compositions
High Pressure Seals
Thermoplastic Materials
Energy Saving Seal
Hydrodynamic Features
Electrical Conductivity

227 patents:

1. 12716497 - Outboard drive axle hub seal with venting (2026-08-25),
2. 12535139 - Contaminant exclusion seal design (2026-01-27),
3. 12442473 - Non-round plug and seal with radial offset capabilities (2025-10-14),
4. 12410866 - Seal cartridge with electrically conductive non-woven grounding (2025-09-09),
5. 12404929 - Coolant tube seal (2025-09-02),
6. 12281703 - Outboard drive axle hub seal with venting (2025-04-21),
7. 12188561 - High pressure offset seal (2025-01-07),
8. 12110920 - High performance plastic radial bearings for rotating and reciprocating applications (2024-10-08),
9. 11933402 - Rubber gasket with molded-in plastic compression limiter (2024-03-19),
10. 11760933 - Thermally conductive electrically insulating thermoplastic materials (2023-09-19),
11. 11754188 - Seal cartridge with electrically conductive non-woven grounding (2023-09-12),
12. 11359724 - Contamination exclusion for seal ring with conductive nonwoven fiber (2022-06-14),
13. 11255382 - Plastic slinger with contacting bumper feature with labyrinth (2022-02-22),
14. 11125336 - Self energized seal (2021-09-21),
15. 11123852 - Two-piece pinion tool (2021-09-21),
Company Overview
Freudenberg-Nok General Partnership, headquartered in Plymouth, MI, specializes in advanced seal technology, focusing on the design and manufacture of high-performance sealing solutions. The company excels in developing dynamic seals, valve stem seals, radial shaft seals, and gasket compositions, utilizing innovative elastomer materials to ensure effective contaminant exclusion and durability under high-pressure conditions. With a commitment to quality and innovation, Freudenberg-Nok serves a diverse range of industries, enhancing the reliability and efficiency of various applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

227 Patents

#3 in Plymouth, MI

#84 in Michigan

#1,848 in US

#3,775 in the World

Plymouth, MI (US)
Plymouth, MI, United States of America

Freudenberg-Nok General Partnership

Forward Citations = 1,763

163 inventors:

goldMedal Edward Hosung Park (26 out of 26 patents)

silverMedal Alexander Berdichevsky (22 out of 22 patents)

bronzeMedal John C Dahlheimer (15 out of 16 patents)

4.  David Sakata (11 out of 11 patents)

5.  Francis Joseph Walker (11 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Freudenberg-Nok General Partnership. Retrieved from https://idiyas.com/company/freudenberg-nok-general-partnership

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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