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For the Inventor, By the Inventor

Tokyo, Japan

Kayaba Industry Company, Ltd.

Calculating rank
USPTO Granted Patents = 308

% Expired Patents = 48.7



Trademarks = 5

Forward Citations = 3,330

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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:
Fluid Pressure Actuator
Shock Absorber
Damping Valve
Railcar Damping Device
Electric Assist Cart
Linear Actuator
Hybrid Construction Machine
Torque Sensor
Control System
Vibration Control
Hydraulic Cylinder
Caliper Brake Device

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),
Company Overview
Kayaba Industry Company, Ltd., headquartered in Tokyo, Japan, specializes in the development and manufacturing of fluid pressure actuators and related technologies. The company is recognized for its innovations in shock absorbers, damping valves, and railcar damping devices, contributing significantly to automotive and industrial applications. Additionally, Kayaba focuses on electric assist carts, linear actuators, hybrid construction machinery, and torque sensors, positioning itself as a key player in advanced engineering solutions within the fluid dynamics sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

308 Patents

#278 in Tokyo

#535 in Japan

#2,907 in the World

Tokyo, JP
Tokyo, Japan

Kayaba Industry Company, Ltd.

Forward Citations = 3,330

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kayaba Industry Company, Ltd.. Retrieved from https://idiyas.com/company/kayaba-industry-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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