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For the Inventor, By the Inventor

Tokyo, Japan

Kayaba Industry Company, Ltd.


USPTO Granted Patents = 308



Trademarks = 5

Forward Citations = 3,248

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336 inventors (with patents filed for the assignee):

goldMedal Haruhiko Kawasaki (21 out of 33 patents)

silverMedal Masahiro Egawa (20 out of 28 patents)

bronzeMedal Takuhiro Kondo (19 out of 23 patents)

4.  Tomoyuki Fujita (11 out of 32 patents)

5.  Masashi Takai (10 out of 10 patents)

6.  Yoshinori Kogiso (9 out of 9 patents)

7.  Hideo Maehara (8 out of 12 patents)

8.  Hirofumi Inoue (8 out of 15 patents)

9.  Noboru Shimizu (8 out of 9 patents)

10.  Naoto Shima (8 out of 8 patents)

11.  Katsuhiro Suzuki (8 out of 10 patents)

12.  Daisuke Tanaka (7 out of 11 patents)

13.  Koichiro Akatsuka (7 out of 20 patents)

14.  Keisuke Mishima (7 out of 8 patents)

15.  Tsunefumi Arita (7 out of 7 patents)


Core Competencies:
Cylinder Device
Vane Pump
Sealing Device
Damping Valve
Magnetorheological Fluid Shock Absorber
Electric Assist Cart
Linear Actuator
Torque Sensor
Fluid Pressure Actuator
Shock Absorber
Control System
Hybrid Construction Machine

308 patents:

1. 9352759 - Cylinder device (2016-05-31),
2. 9239091 - Sealing device and suspension device with the sealing device (2016-01-19),
3. 9239050 - Vane pump (2016-01-19),
4. 9234560 - Damping valve (2016-01-12),
5. 9233695 - Railcar damping device (2016-01-12),
6. 9228910 - Abnormality diagnosis apparatus and abnormality diagnosis method for torque sensor (2016-01-05),
7. 9228631 - Damping valve (2016-01-05),
8. 9228323 - Control system for construction machine (2016-01-05),
9. 9221315 - Cylinder unit (2015-12-29),
10. 9217486 - Magnetorheological fluid shock absorber (2015-12-22),
11. 9205746 - Electric assist cart (2015-12-08),
12. 9200692 - Leaf valve structure (2015-12-01),
13. 9200430 - Control system for hybrid construction machine (2015-12-01),
14. 9199644 - Speed ratio control device and method for working vehicle (2015-12-01),
15. 9197120 - Linear actuator (2015-11-24),
Kayaba Industry Company, Ltd. is a leading global manufacturer of hydraulic equipment and suspension systems. Established in 1919 and headquartered in Tokyo, Japan, the company has a rich history of providing innovative solutions for various industries, including automotive, construction, and agriculture. With a strong focus on research and development, Kayaba continuously strives to enhance its products and exceed customer expectations. Their commitment to quality, reliability, and customer satisfaction has made them a trusted partner for businesses worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 23 2025

308 Patents

#242 in Tokyo

#516 in Japan

#2,819 in the World

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Tokyo, Japan

Kayaba Industry Company, Ltd.

Forward Citations = 3,248

336 inventors:

goldMedal Haruhiko Kawasaki (21 out of 33 patents)

silverMedal Masahiro Egawa (20 out of 28 patents)

bronzeMedal Takuhiro Kondo (19 out of 23 patents)

4.  Tomoyuki Fujita (11 out of 32 patents)

5.  Masashi Takai (10 out of 10 patents)

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