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Nok Corporation

USPTO Granted Patents = 816

% Expired Patents = 19.5

CIPO Patents = 10

EPO Patents = 437

Trademarks = 16

Forward Citations = 4,269

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738 inventors (with patents filed for the assignee):

Kenji Sasaki (28 out of 32 patents)

Shigeru Watanabe (26 out of 107 patents)

Hiroki Matsui (21 out of 21 patents)

4. Hajime Yui (19 out of 19 patents)

5. Koji Watanabe (19 out of 96 patents)

6. Takehiro Nakagawa (17 out of 34 patents)

7. Toshihiro Higashira (17 out of 17 patents)

8. Katsumi Abe (16 out of 16 patents)

9. Shinya Nakaoka (16 out of 17 patents)

10. Masayuki Tanida (15 out of 15 patents)

11. Kokichi Hamamoto (15 out of 15 patents)

12. Yoshiyuki Abe (15 out of 15 patents)

13. Kenichi Oba (14 out of 14 patents)

14. Yusuke Yoshida (14 out of 19 patents)

15. Yoshihiro Kurano (14 out of 14 patents)

Core Competencies:

Sealing Device

Gasket

Hollow Fiber Membrane

Rubber Composition

Seal Structure

Torsional Damper

Bioelectrode

Inspection Method

Conductive Roller

Vibration Damper

Cleaning Blade

Aqueous Surface-Treating Agent

816 patents: Sort by Forward Citations

1. 12747792 - Sealing device and electric motor (2026-09-29),

2. 12747789 - Gasket (2026-09-29),

3. 12746514 - Hollow fiber membrane module (2026-09-29),

4. 12742103 - Method for manufacturing seal body, and seal body (2026-09-22),

5. 12727805 - Bioelectrode (2026-09-08),

6. 12716494 - Sealing device and back-up ring (2026-08-25),

7. 12698830 - Gasket and sealing structure (2026-08-04),

8. 12692942 - Rubber-metal laminate and gasket (2026-07-28),

9. 12692330 - Fluororubber composition (2026-07-28),

10. 12687228 - Sealing device (2026-07-21),

11. 12686762 - Nitrile rubber-based composition (2026-07-21),

12. 12685967 - Hollow fiber membrane module (2026-07-21),

13. 12671219 - Conductive structural body and conduction method (2026-06-30),

14. 12669178 - Method for manufacturing sealing structure and sealing structure (2026-06-30),

15. 12663081 - Sealing device (2026-06-23),

Nok Corporation, headquartered in Tokyo, Japan, specializes in the development and manufacture of sealing devices, which are critical components in various industrial applications. The company focuses on advanced technologies such as gaskets, hollow fiber membranes, and rubber compositions, ensuring high-performance seal structures. Additionally, Nok Corporation is involved in the innovation of torsional dampers and bioelectrodes, alongside the development of inspection methods to enhance product reliability and efficiency across multiple sectors.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Nok Corporation

816 Patents

#130 in

#263 in

#1,236 in the World

Nok Corporation

Forward Citations = 4,269

738 inventors:

Kenji Sasaki (28 out of 32 patents)

Shigeru Watanabe (26 out of 107 patents)

Hiroki Matsui (21 out of 21 patents)

4. Hajime Yui (19 out of 19 patents)

5. Koji Watanabe (19 out of 96 patents)

Please report any incorrect information to [email protected]

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