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Hitachinaka, Japan

Hitachi Astemo Ltd.

Calculating rank

USPTO Granted Patents = 1,505

% Expired Patents = 0.47

EPO Patents = 371

Trademarks = 33

Forward Citations = 517

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1,543 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 (24 out of 44 patents)

5. Hiroshi Nakano (23 out of 128 patents)

6. Shigehisa Aoyagi (21 out of 41 patents)

7. Nobuyuki Ichimaru (19 out of 47 patents)

8. Mikio Yamashita (19 out of 44 patents)

9. Kazuyoshi Serizawa (19 out of 62 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

1,505 patents: Sort by Forward Citations

1. 12775061 - Radar device (2026-10-27),

2. 12774731 - Bumper cap and shock absorber (2026-10-27),

3. 12773988 - Vehicle control device (2026-10-27),

4. 12773971 - Control device for electric brake, control method for electric brake, and motor control device (2026-10-27),

5. 12771261 - Power conversion device (2026-10-20),

6. 12770511 - Route generation device, vehicle control device, and vehicle route distribution system (2026-10-20),

7. 12768929 - Vehicle control device (2026-10-20),

8. 12768669 - Map information correction device and map information correction system (2026-10-20),

9. 12768326 - Fuel injection valve (2026-10-20),

10. 12767068 - Vehicle control device, and overheat protection device (2026-10-20),

11. D1152933 - Caliper body of disc brake (2026-10-13),

12. 12764077 - Bus communication device and data communication method (2026-10-13),

13. 12763715 - Motor control device and motor control method (2026-10-13),

14. 12762906 - Battery control device (2026-10-13),

15. 12762867 - Dividing line recognition device (2026-10-13),

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 27 2026

1,505 Patents

#1 in Hitachinaka

#152 in Japan

#655 in the World

Hitachinaka, Japan

Hitachi Astemo Ltd.

Forward Citations = 517

1,543 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 (24 out of 44 patents)

5. Hiroshi Nakano (23 out of 128 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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