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Hitachi Automotive Systems Steering, Ltd.

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USPTO Granted Patents = 50

% Expired Patents = 34.0

EPO Patents = 1

Forward Citations = 115

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48 inventors (with patents filed for the assignee):

Tatsuyoshi Maruyama (10 out of 23 patents)

Kohtaro Shiino (7 out of 36 patents)

Kiyotaka Shirakubo (7 out of 8 patents)

4. Shogo Ishikawa (7 out of 10 patents)

5. Osamu Yoshida (6 out of 49 patents)

6. Satoru Muto (5 out of 5 patents)

7. Atsushi Yoshitake (5 out of 6 patents)

8. Takumi Hisazumi (4 out of 13 patents)

9. Keisuke Kitamura (4 out of 11 patents)

10. Mitsuo Sasaki (4 out of 53 patents)

11. Kazuya Yamano (4 out of 17 patents)

12. Sosuke Sunaga (4 out of 5 patents)

13. Susumu Kimoto (3 out of 5 patents)

14. Satoshi Muramatsu (3 out of 4 patents)

15. Masaki Kodato (3 out of 4 patents)

Core Competencies:

Power Steering Device

Variable Displacement Pump

Torque Sensor

Electric Power Steering

Control Apparatus

Steering Angle Sensor

Power Steering System

Backlash Adjustment

Motor Control Apparatus

Hydraulic Power System

Torque Detection Structure

Integrated Power Steering

50 patents: Sort by Forward Citations

1. 9994252 - Power steering device (2018-06-12),

2. 9988080 - Power steering device and control device for vehicle-mounted instrument (2018-06-05),

3. 9919729 - Power steering system (2018-03-20),

4. 9903366 - Variable displacement vane pump (2018-02-27),

5. 9873851 - Grease composition for electric power steering device, and electric power steering device (2018-01-23),

6. 9863417 - Variable displacement vane pump (2018-01-09),

7. 9828991 - Variable displacement vane pump (2017-11-28),

8. 9796414 - Electric power steering device and control device of electric power steering device (2017-10-24),

9. 9796409 - Power steering device and control device for vehicle-mounted instrument (2017-10-24),

10. 9714657 - Variable displacement vane pump and power steering system (2017-07-25),

11. 9707994 - Power steering device (2017-07-18),

12. 9694847 - Torque detection structure for power steering device, and power steering device using same (2017-07-04),

13. 9540041 - Power steering apparatus and method for assembling power steering apparatus (2017-01-10),

14. 9511797 - Integral power steering device (2016-12-06),

15. 9505433 - Power steering apparatus and backlash adjustment mechanism therefor (2016-11-29),

Company Overview

Hitachi Automotive Systems Steering, Ltd., based in Saitama, Japan, specializes in advanced power steering technologies. The company focuses on the development and manufacturing of innovative steering solutions, including electric power steering systems, variable displacement pumps, and torque sensors. Their expertise extends to control apparatus and steering angle sensors, ensuring enhanced vehicle performance and safety. Hitachi Automotive Systems Steering is committed to advancing automotive engineering through cutting-edge technology and precision in steering systems.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

50 Patents

#34 in Saitama 343-0827

#1,710 in Japan

#14,027 in the World

Hitachi Automotive Systems Steering, Ltd.

Forward Citations = 115

48 inventors:

Tatsuyoshi Maruyama (10 out of 23 patents)

Kohtaro Shiino (7 out of 36 patents)

Kiyotaka Shirakubo (7 out of 8 patents)

4. Shogo Ishikawa (7 out of 10 patents)

5. Osamu Yoshida (6 out of 49 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Automotive Systems Steering, Ltd.. Retrieved from https://idiyas.com/company/hitachi-automotive-systems-steering

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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