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Nsk-Warner Kabushiki Kaisha

USPTO Granted Patents = 42

EPO Patents = 2

Forward Citations = 245

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58 inventors (with patents filed for the assignee):

Shigeki Umezawa (10 out of 23 patents)

Yoshio Kinoshita (6 out of 48 patents)

Masahiro Mori (4 out of 24 patents)

4. Shun Kitahara (4 out of 10 patents)

5. Hirokazu Yagi (4 out of 4 patents)

6. Makoto Suzuki (4 out of 7 patents)

7. Kazuhiko Muramatsu (3 out of 31 patents)

8. Tsuyoshi Hirayanagi (3 out of 10 patents)

9. Kazuyuki Fujita (3 out of 3 patents)

10. Toshiaki Wakisaka (3 out of 7 patents)

11. Fumimasa Muramatsu (2 out of 5 patents)

12. Masaki Sakai (2 out of 9 patents)

13. Sousuke Kawai (2 out of 2 patents)

14. Hiroshi Yabe (2 out of 18 patents)

15. Rikiya Takahashi (2 out of 2 patents)

Core Competencies:

Friction Plates

Wet Friction Material

Multi-Plate Clutch

Brake Band

One-Way Clutch

Torque Converter

Brake Drum

Seat Belt Apparatus

Manufacturing Methods

Friction Coefficient

Clutch Engagement

Spring Mechanisms

42 patents: Sort by Forward Citations

1. 7984801 - Friction plate for wet multi-plate clutch (2011-07-26),

2. 7749926 - Wet type friction member (2010-07-06),

3. 7491664 - Wet friction material (2009-02-17),

4. 7172671 - Method of manufacturing friction plate (2007-02-06),

5. 7172062 - Friction plate for wet type multiplate clutch (2007-02-06),

6. 7028403 - Method of manufacturing friction plate and apparatus thereof (2006-04-18),

7. 6929717 - Paper making method and apparatus (2005-08-16),

8. 6780283 - Wet friction material and manufacturing method therefor (2004-08-24),

9. 6667103 - Wet friction material (2003-12-23),

10. 6586373 - Wet friction material (2003-07-01),

11. 6544632 - Wet friction material and manufacturing method therefor (2003-04-08),

12. 6331358 - Wet friction material and process for producing the same (2001-12-18),

13. 6265066 - Wet friction material (2001-07-24),

14. 6253883 - Brake drum with parallel grooves (2001-07-03),

15. 6197371 - Brake band having an improved initial friction coefficient (2001-03-06),

NSK-Warner Kabushiki Kaisha is a global manufacturing company specializing in the production of precision machinery and parts. With a focus on automotive and industrial applications, NSK-Warner is renowned for its high-quality products and innovative solutions. The company is committed to delivering exceptional performance, reliability, and customer satisfaction. For more information, please visit our website.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

42 Patents

#777 in Tokyo

#1,867 in Japan

#15,862 in the World

Nsk-Warner Kabushiki Kaisha

Forward Citations = 245

58 inventors:

Shigeki Umezawa (10 out of 23 patents)

Yoshio Kinoshita (6 out of 48 patents)

Masahiro Mori (4 out of 24 patents)

4. Shun Kitahara (4 out of 10 patents)

5. Hirokazu Yagi (4 out of 4 patents)

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