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Nippon Seiko Kabushiki Kaisha

USPTO Granted Patents = 355

Trademarks = 16

Forward Citations = 4,034

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316 inventors (with patents filed for the assignee):

Nobuyuki Osawa (16 out of 31 patents)

Osamu Kawai (12 out of 34 patents)

Kazuo Yamamoto (12 out of 36 patents)

4. Toru Tsukada (10 out of 51 patents)

5. Isamu Chikuma (9 out of 26 patents)

6. Katsuyasu Ono (9 out of 44 patents)

7. Kyozaburo Furumura (9 out of 16 patents)

8. Hiroyuki Saito (8 out of 108 patents)

9. Sakae Matsumoto (7 out of 26 patents)

10. Katsuhiko Tanaka (7 out of 63 patents)

11. Mitsuo Ichikawa (7 out of 8 patents)

12. Naoki Saito (7 out of 7 patents)

13. Hideo Okoshi (7 out of 7 patents)

14. Atsushi Yokouchi (6 out of 33 patents)

15. Yasuo Murakami (6 out of 50 patents)

Core Competencies:

Microbe Strain

Bearing Steel

Rolling Bearing

Magnetic Fluid Seal

Speed Sensing Hub

Actuator Controller

Impact Absorbing Steering

Linear Guide Apparatus

Magnetically Controlled Bearing

Dynamic Pressure Bearing

Occupant Protective Systems

Automatic Center Adjusting Bearing

355 patents: Sort by Forward Citations

1. 6379948 - Microbe SKB-1152 strain, and method of bleaching pulp therewith (2002-04-30),

2. 5590225 - Plastic holder for bearing (1996-12-31),

3. 5421088 - Method of assembling a preload-type, double-row ball bearing (1995-06-06),

4. 5332460 - Method of manufacturing a seal ring for magnetic fluid seal device (1994-07-26),

5. 5298323 - Bearing steel and rolling bearing made thereof (1994-03-29),

6. 5263366 - Speed sensing hub unit (1993-11-23),

7. 5259886 - Rolling member (1993-11-09),

8. 5252391 - Surface treated sliding or rolling contact element and rolling bearing (1993-10-12),

9. D340041 - Actuator controller (1993-10-05),

10. 5251154 - Method for measuring accuracy of thread groove and system for the same (1993-10-05),

11. 5228720 - Coupler of collapsible shaft for steering device (1993-07-20),

12. 5222913 - Resilient connector for steering shaft (1993-06-29),

13. 5218744 - Magnet-inclusive component suitable for use in occupant-protecting means (1993-06-15),

14. 5209135 - Impact absorbing type steering column device (1993-05-11),

15. 5204711 - Projection exposure device (1993-04-20),

Nippon Seiko Kabushiki Kaisha, commonly known as NSK, is a Japanese multinational corporation specializing in the manufacture and supply of automotive components, precision machinery, and bearings. With a rich history spanning over a century, NSK has become a global leader in the industry, consistently delivering high-quality products and solutions that meet the evolving needs of customers. For more information about NSK and its diverse range of products, please visit their official website.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

355 Patents

#207 in Tokyo

#458 in Japan

#2,502 in the World

Nippon Seiko Kabushiki Kaisha

Forward Citations = 4,034

316 inventors:

Nobuyuki Osawa (16 out of 31 patents)

Osamu Kawai (12 out of 34 patents)

Kazuo Yamamoto (12 out of 36 patents)

4. Toru Tsukada (10 out of 51 patents)

5. Isamu Chikuma (9 out of 26 patents)

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