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Hitachinaka, Japan

Hitachi Astemo Ltd.

USPTO Granted Patents = 1,487

% Expired Patents = 0.47

EPO Patents = 371

Trademarks = 33

Forward Citations = 481

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1,529 inventors (with patents filed for the assignee):

Hideyuki Sakamoto (49 out of 75 patents)

Ryusuke Hirao (27 out of 43 patents)

Toshiyuki Ajima (26 out of 52 patents)

4. Takafumi Hara (23 out of 43 patents)

5. Hiroshi Nakano (22 out of 127 patents)

6. Shigehisa Aoyagi (20 out of 40 patents)

7. Nobuyuki Ichimaru (19 out of 47 patents)

8. Mikio Yamashita (19 out of 44 patents)

9. Kazuyoshi Serizawa (18 out of 61 patents)

10. Masashi Seimiya (17 out of 28 patents)

11. Tatsuhiko Monji (17 out of 67 patents)

12. Katsuhiro Hoshino (17 out of 29 patents)

13. Osamu Mukaihara (16 out of 35 patents)

14. Kenichi Nakayama (16 out of 61 patents)

15. Nobuyoshi Morita (16 out of 28 patents)

Core Competencies:

Shock Absorber

Electric Vehicle Control

Driving Assistance

Power Conversion

Synchronous Machine

Blind Spot Monitoring

Electronic Control Device

Inverter Control

Vehicle Charging

Heat Exchange Device

Visual Inspection

Autonomous Driving

1,487 patents: Sort by Forward Citations

1. 12756341 - Synchronous machine control device, synchronous machine control method, and electric vehicle (2026-10-06),

2. 12756340 - Motor control device and electric vehicle (2026-10-06),

3. 12756337 - Motor control device and magnetic pole position calculation method (2026-10-06),

4. 12756271 - Electric motor system (2026-10-06),

5. 12756265 - Motor device, method of manufacturing motor device, terminal connection mechanism, terminal connection method, and electric brake device (2026-10-06),

6. 12753811 - Disc brake and cover component (2026-10-06),

7. 12752806 - Electronic control device and vehicle control system (2026-10-06),

8. 12752585 - Suspension control device, suspension control method, and suspension control system (2026-10-06),

9. 12749322 - Electronic control unit and object identification method (2026-09-29),

10. 12747770 - Shock absorber (2026-09-29),

11. 12746900 - Control apparatus for electric brake, electric brake apparatus, and method for controlling electric brake (2026-09-29),

12. 12746824 - Power supply network, electric vehicle, and power conversion device (2026-09-29),

13. 12742702 - Internal combustion engine control device (2026-09-22),

14. 12742658 - Computing device, own-position estimating device, and map information generating method (2026-09-22),

15. 12742649 - Route conversion device, route verification program, and teaching data generation method (2026-09-22),

Company Overview

Hitachi Astemo Ltd., headquartered in Hitachinaka, Japan, specializes in advanced vehicle control devices that enhance driving safety and efficiency. The company focuses on developing innovative technologies such as shock absorbers, electric vehicle control systems, and driving assistance solutions. With expertise in power conversion and synchronous machines, Hitachi Astemo is committed to advancing automotive technology, including electronic control devices and inverter control systems, to support the evolving needs of the automotive industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

1,487 Patents

#1 in Hitachinaka

#153 in Japan

#660 in the World

Hitachinaka, Japan

Hitachi Astemo Ltd.

Forward Citations = 481

1,529 inventors:

Hideyuki Sakamoto (49 out of 75 patents)

Ryusuke Hirao (27 out of 43 patents)

Toshiyuki Ajima (26 out of 52 patents)

4. Takafumi Hara (23 out of 43 patents)

5. Hiroshi Nakano (22 out of 127 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Astemo Ltd.. Retrieved from https://idiyas.com/company/hitachi-astemo

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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