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Koyo Seiko Company, Ltd.

USPTO Granted Patents = 772

CIPO Patents = 3

Trademarks = 9

Forward Citations = 6,632

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716 inventors (with patents filed for the assignee):

Takeshi Takahashi (27 out of 30 patents)

Kazutoshi Toda (24 out of 39 patents)

Hirofumi Matsuoka (24 out of 34 patents)

4. Hiroshi Ueno (22 out of 83 patents)

5. Osamu Sano (21 out of 23 patents)

6. Hirochika Ueyama (21 out of 25 patents)

7. Mitsuhiko Nishimoto (21 out of 23 patents)

8. Hideki Fujiwara (19 out of 58 patents)

9. Shinichirou Kashiwagi (17 out of 20 patents)

10. Hiroaki Takebayashi (17 out of 19 patents)

11. Katsutoshi Nishizaki (16 out of 27 patents)

12. Tomohiro Ishii (16 out of 18 patents)

13. Yoshitomo Tokumoto (15 out of 29 patents)

14. Tetsuya Murakami (15 out of 22 patents)

15. Hiroji Okuda (15 out of 15 patents)

Core Competencies:

Electric Power Steering

Rolling Bearings

Torque Sensors

Vehicle Steering Apparatus

Lubricant Composition

Manufacturing Methods

Power Transmission Devices

Briquette for Iron Manufacture

Shock Absorbing Steering Devices

Ball Screw Mechanisms

Tapered Roller Bearings

Coated Articles

772 patents: Sort by Forward Citations

1. 8336412 - Electric power steering apparatus (2012-12-25),

2. 7763124 - Steel material with excellent rolling fatigue life and method of producing the same (2010-07-27),

3. 7709427 - Lubricant composition, speed reduction gear using the same, and electric power steering apparatus using the same (2010-05-04),

4. 7690846 - Bearing device and method of manufacturing the bearing device (2010-04-06),

5. 7662245 - Steering rack comprising steel bar with rack teeth (2010-02-16),

6. 7612556 - Rolling bearing (2009-11-03),

7. 7595095 - Coated article, manufacturing method therefor and coating apparatus (2009-09-29),

8. 7540569 - Wheel-use bearing apparatus (2009-06-02),

9. 7524238 - Method of processing antifriction bearing unit for wheel (2009-04-28),

10. 7512468 - Electric power steering apparatus (2009-03-31),

11. 7508148 - Vehicle steering apparatus (2009-03-24),

12. 7488270 - Toroidal continuously variable transmission and method for producing torque transmitting member thereof (2009-02-10),

13. 7484890 - Rolling slide member (2009-02-03),

14. 7484760 - Column hole cover (2009-02-03),

15. 7438740 - Briquette for raw material for iron manufacture and briquette for introduction into slag generating apparatus (2008-10-21),

Koyo Seiko Company, Ltd. is a leading manufacturer of bearings and automotive steering systems. With a rich history of over 100 years, Koyo Seiko is known for its high-quality products and innovative solutions. Their diverse range of bearings includes ball bearings, cylindrical roller bearings, and tapered roller bearings, among others. Additionally, the company offers advanced steering systems for various vehicles, ensuring optimal performance and safety. Koyo Seiko is committed to customer satisfaction, continuous improvement, and technological advancements.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

772 Patents

#34 in Osaka

#269 in Japan

#1,261 in the World

Koyo Seiko Company, Ltd.

Forward Citations = 6,632

716 inventors:

Takeshi Takahashi (27 out of 30 patents)

Kazutoshi Toda (24 out of 39 patents)

Hirofumi Matsuoka (24 out of 34 patents)

4. Hiroshi Ueno (22 out of 83 patents)

5. Osamu Sano (21 out of 23 patents)

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