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For the Inventor, By the Inventor

Hiroshima, Japan

Kobelco Construction Machinery Co., Ltd.


USPTO Granted Patents = 631


Trademarks = 21

Forward Citations = 3,913

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432 inventors (with patents filed for the assignee):

goldMedal Yoichiro Yamazaki (55 out of 56 patents)

silverMedal Shintaro Sakitani (43 out of 45 patents)

bronzeMedal Seiji Saiki (42 out of 42 patents)

4.  Koji Ueda (33 out of 34 patents)

5.  Keiji Yamamoto (28 out of 28 patents)

6.  Koji Yamashita (26 out of 28 patents)

7.  Masayuki Komiyama (25 out of 29 patents)

8.  Kaoru Adachi (23 out of 23 patents)

9.  Isao Miyachi (21 out of 25 patents)

10.  Hitoshi Sasaki (21 out of 25 patents)

11.  Hiroshi Kanamaru (19 out of 19 patents)

12.  Hirokazu Imashige (19 out of 20 patents)

13.  Hidekazu Oka (18 out of 18 patents)

14.  Masaaki Murakami (18 out of 18 patents)

15.  Yusuke Kamimura (17 out of 17 patents)


Core Competencies:
Work Planning Assistance
Abnormal Operation Detection
Travel Route Simulation
Rotary Construction Machine
Exhaust Gas Aftertreatment
Target Path Generation
Remote Operation Assistance
Work Machine Monitoring
Periphery Detection
Crane Control
Image Processing
Work Machine Safety

631 patents:

1. 12509858 - Work machine (2025-12-30),
2. 12509856 - Remote operation assistance server, remote operation assistance system, and remote operation assistance method (2025-12-30),
3. 12509855 - Remote control system for construction machine (2025-12-30),
4. 12508918 - Electric work machine (2025-12-30),
5. 12497751 - Drilling position determination system, drilling control system, and work machine (2025-12-16),
6. 12488294 - Work planning assistance device and work planning assistance method (2025-12-02),
7. 12486649 - System for detecting abnormal operation of work machines (2025-12-02),
8. 12474707 - Travel route simulator for construction machine (2025-11-18),
9. 12460374 - Rotary construction machine (2025-11-04),
10. 12454444 - Work machine and method for controlling work machine (2025-10-28),
11. 12454252 - Jack device and work machine equipped with same (2025-10-28),
12. 12441562 - Device for assessing position of conveyance vehicle (2025-10-14),
13. 12436544 - Work assistance system and work assistance composite system (2025-10-07),
14. 12434947 - Handrail device and work machine comprising same (2025-10-07),
15. 12404816 - Diagnostic device for exhaust gas aftertreatment device, diagnostic method for exhaust gas aftertreatment device, and diagnostic program for exhaust gas aftertreatment device (2025-09-02),
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USPTO Data Jan 1 1976 - Dec 30 2025

631 Patents

#2 in Hiroshima

#308 in Japan

#1,522 in the World

...
Hiroshima, Japan

Kobelco Construction Machinery Co., Ltd.

Forward Citations = 3,913

432 inventors:

goldMedal Yoichiro Yamazaki (55 out of 56 patents)

silverMedal Shintaro Sakitani (43 out of 45 patents)

bronzeMedal Seiji Saiki (42 out of 42 patents)

4.  Koji Ueda (33 out of 34 patents)

5.  Keiji Yamamoto (28 out of 28 patents)

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