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For the Inventor, By the Inventor

Tokyo, Japan

Hitachi Construction Machinery Co., Ltd.


USPTO Granted Patents = 1,504



Trademarks = 21

Forward Citations = 10,653

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1,263 inventors (with patents filed for the assignee):

goldMedal Kouji Ishikawa (111 out of 111 patents)

silverMedal Shinya Imura (97 out of 113 patents)

bronzeMedal Genroku Sugiyama (93 out of 94 patents)

4.  Toichi Hirata (89 out of 91 patents)

5.  Hiroshi Watanabe (71 out of 80 patents)

6.  Hidetoshi Satake (65 out of 65 patents)

7.  Yasutaka Tsuruga (55 out of 62 patents)

8.  Kazunori Nakamura (54 out of 57 patents)

9.  Shiho Izumi (53 out of 68 patents)

10.  Hidekazu Moriki (51 out of 54 patents)

11.  Hiroshi Sakamoto (46 out of 146 patents)

12.  Shinji Nishikawa (46 out of 46 patents)

13.  Masatoshi Hoshino (42 out of 68 patents)

14.  Seiji Hijikata (42 out of 42 patents)

15.  Tsuyoshi Nakamura (42 out of 42 patents)


Core Competencies:
Construction Machinery
Work Machine
Electric Work Machine
Dump Truck
Wheel Loader
Mine Management
Remote Operation Device
Automated Work System
Vehicle Management
Power Transmission Device
Deep Foundation Excavator
Control System

1,504 patents:

1. 12505709 - Vehicle body management system (2025-12-23),
2. 12497758 - Work machine and remote operation system of work (2025-12-16),
3. 12497757 - Control system for work machine (2025-12-16),
4. 12497073 - Autonomous travelling mine vehicle (2025-12-16),
5. 12492726 - Sliding component and method for manufacturing same (2025-12-09),
6. 12491861 - Hauling vehicle and vehicle control system (2025-12-09),
7. 12486641 - Construction machine including a controller performing an operation limiting process for limiting an operation for moving a working device of the construction machine (2025-12-02),
8. 12480281 - Construction machine (2025-11-25),
9. 12473715 - Work machine (2025-11-18),
10. 12473712 - Construction machine (2025-11-18),
11. 12468303 - Work machines (2025-11-11),
12. 12467236 - Work machine (2025-11-11),
13. 12467225 - Work machine assisting operation of operator by performing semi-automatic control (2025-11-11),
14. 12467223 - Work vehicle apparatus for loading efficiency (2025-11-11),
15. 12460390 - Completed-work information processing system (2025-11-04),
Hitachi Construction Machinery Co., Ltd. is a leading manufacturer and supplier of construction machinery, including excavators, haul trucks, wheel loaders, and various other equipment. With a strong focus on quality and technological innovation, the company delivers reliable and efficient solutions to meet the diverse needs of the construction industry. For more information, please visit their website.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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1,504 Patents

#73 in Tokyo

#148 in Japan

#642 in the World

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Tokyo, Japan

Hitachi Construction Machinery Co., Ltd.

Forward Citations = 10,653

1,263 inventors:

goldMedal Kouji Ishikawa (111 out of 111 patents)

silverMedal Shinya Imura (97 out of 113 patents)

bronzeMedal Genroku Sugiyama (93 out of 94 patents)

4.  Toichi Hirata (89 out of 91 patents)

5.  Hiroshi Watanabe (71 out of 80 patents)

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