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For the Inventor, By the Inventor

Aichi, Japan

Sumitomo Riko Company Limited


USPTO Granted Patents = 340



Trademarks = 3

Forward Citations = 438

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463 inventors (with patents filed for the assignee):

goldMedal Takayoshi Yasuda (14 out of 22 patents)

silverMedal Koichi Hasegawa (14 out of 54 patents)

bronzeMedal Tomohiro Kanaya (13 out of 19 patents)

4.  Katsuhiko Nakano (12 out of 13 patents)

5.  Shigeaki Takamatsu (11 out of 13 patents)

6.  Koji Tomiyama (10 out of 10 patents)

7.  Masaki Nasu (10 out of 10 patents)

8.  Yorihiro Takimoto (10 out of 11 patents)

9.  Kei Okumura (10 out of 20 patents)

10.  Takemasa Okumura (9 out of 10 patents)

11.  Kazuki Hatanaka (9 out of 9 patents)

12.  Koji Mizutani (9 out of 13 patents)

13.  Hitoshi Yoshikawa (9 out of 19 patents)

14.  Hiroyuki Ichikawa (9 out of 55 patents)

15.  Hironori Koyama (9 out of 20 patents)


Core Competencies:
Vibration Damping Device
Fluid-Filled Damping Device
Electrostatic Transducer
Rubber Bushing
Thermal Insulation Material
Antivibration Device
Flexographic Printing Plate
Charging Roll
Hydraulic Bearing
Sensor-Equipped Seat
Silicone Rubber Composition
Cylindrical Antivibration Device

340 patents:

1. 12510850 - Belt member for electrophotographic apparatus (2025-12-30),
2. 12503010 - Sensor-equipped seat (2025-12-23),
3. 12492733 - Sliding bushing (2025-12-09),
4. 12492329 - Seal member (2025-12-09),
5. 12491760 - Tubular vibration damping device (2025-12-09),
6. 12486881 - Fluid-filled vibration damping device (2025-12-02),
7. 12466250 - Vibration damping device (2025-11-11),
8. 12461464 - Charging roll for electrophotographic equipment (2025-11-04),
9. 12455634 - Interior member (2025-10-28),
10. 12454292 - Rubber bushing for railroad trucks (2025-10-28),
11. 12441035 - Urethane foam-molded article and method for producing same (2025-10-14),
12. 12434887 - Cover (2025-10-07),
13. 12420676 - Sensor-equipped seat (2025-09-23),
14. 12410845 - Sliding bushing (2025-09-09),
15. 12397574 - Flexographic printing original plate (2025-08-26),
Sumitomo Riko Company Limited, founded in 1929, is a global manufacturer of automotive and industrial products. The company specializes in the production of automotive rubber parts, anti-vibration systems, hoses, and other related products. With a focus on innovation and sustainability, Sumitomo Riko provides high-quality solutions to meet the evolving needs of the automotive industry and other sectors worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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340 Patents

#5 in Aichi

#475 in Japan

#2,587 in the World

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Aichi, Japan

Sumitomo Riko Company Limited

Forward Citations = 438

463 inventors:

goldMedal Takayoshi Yasuda (14 out of 22 patents)

silverMedal Koichi Hasegawa (14 out of 54 patents)

bronzeMedal Tomohiro Kanaya (13 out of 19 patents)

4.  Katsuhiko Nakano (12 out of 13 patents)

5.  Shigeaki Takamatsu (11 out of 13 patents)

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