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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Construction Machinery

Calculating rank
USPTO Granted Patents = 59

% Expired Patents = 1.7


Forward Citations = 52

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341 inventors (with patents filed for the assignee):

goldMedal Ryu Narikawa (7 out of 26 patents)

silverMedal Shinya Imura (7 out of 120 patents)

bronzeMedal Hidefumi Ishimoto (6 out of 41 patents)

4.  Shinji Nishikawa (6 out of 52 patents)

5.  Akihiro Narazaki (6 out of 38 patents)

6.  Teppei Saitoh (5 out of 26 patents)

7.  Hidekazu Moriki (4 out of 58 patents)

8.  Hideaki Ito (4 out of 4 patents)

9.  Masaki Kanai (3 out of 18 patents)

10.  Tadashi Kotani (3 out of 9 patents)

11.  Kei Satou (3 out of 5 patents)

12.  Koji Shiwaku (3 out of 6 patents)

13.  Hiroshi Tsukui (3 out of 3 patents)

14.  Kento Kumagai (3 out of 3 patents)

15.  Takaaki Chiba (2 out of 27 patents)


Core Competencies:
Welding Measuring System
Electric Powered Working Machine
Remote Control System
Performance Diagnostic Device
Hydraulic Shovel
Unmanned Work Machine
Traffic Control System
Work Management System
Control Device
Component Service Life Prediction
Construction Assistance System
Action Recognition System

59 patents:

1. 12782384 - Speed measurement device (2026-11-03),
2. 12781844 - Traveling device for wheeled vehicle (2026-11-03),
3. 12781474 - Work machine (2026-11-03),
4. 12774587 - Construction machine configured to perform operation limiting control to limit the operation of an actuator when an obstacle sensor detects an obstacle (2026-10-27),
5. 12774580 - Work machine (2026-10-27),
6. 12768149 - Construction machine (2026-10-20),
7. 12753569 - Construction machine (2026-10-06),
8. 12747562 - Work machine (2026-09-29),
9. 12746624 - Welding measuring system and welding measuring method (2026-09-29),
10. 12742411 - Transportation vehicle (2026-09-22),
11. 12742307 - Construction machine (2026-09-22),
12. 12738756 - Electric powered working machine (2026-09-15),
13. 12729513 - Work machine (2026-09-08),
14. 12729510 - Remote control system, remote-operated work machine system, and work information display control method (2026-09-08),
15. 12728854 - Hauling vehicle and traffic control system (2026-09-08),
Company Overview
Hitachi Construction Machinery, headquartered in Tokyo, Japan, specializes in the development and manufacture of advanced construction machinery. The company focuses on innovative technologies such as welding measuring systems, electric-powered working machines, and remote control systems. Its product portfolio includes hydraulic shovels and unmanned work machines, emphasizing efficiency and performance. Hitachi Construction Machinery also invests in traffic control and work management systems, enhancing operational capabilities in the construction sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

59 Patents

#734 in Tokyo

#1,557 in Japan

#12,252 in the World

Tokyo, JP
Tokyo, Japan

Hitachi Construction Machinery

Forward Citations = 52

341 inventors:

goldMedal Ryu Narikawa (7 out of 26 patents)

silverMedal Shinya Imura (7 out of 120 patents)

bronzeMedal Hidefumi Ishimoto (6 out of 41 patents)

4.  Shinji Nishikawa (6 out of 52 patents)

5.  Akihiro Narazaki (6 out of 38 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Construction Machinery. Retrieved from https://idiyas.com/company/hitachi-construction-machinery

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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