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For the Inventor, By the Inventor

Hitachi, Japan

Hiroshi Kuroiwa

This inventor holds 88 USPTO granted patents and 4 EPO patents, primarily in Automotive Control Systems (CPC class 73118). Top assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd., Hitachi Car Engineering Co., Ltd.. Active years: 1979-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Kuroiwa. Retrieved from https://idiyas.com/inventor/hiroshi-kuroiwa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 88

% Patents Active = 78.4

 

Average Co-Inventor Count = 3.5

ph-index = 20

Forward Citations = 1,117(Granted Patents)

Forward Citations (Not Self Cited) = 1,073(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ibaraki, JP (1983 - 1998)
  • Maebashi, JP (2004)
  • Chiyoda-ku, JP (2007)
  • Hitachl, JP (2007)
  • Hitachinaka, JP (2009)
  • Hitachi, JP (1979 - 2011)
  • Kanagawa, JP (2013 - 2017)
  • Tokyo, JP (2007 - 2019)

Company Filing History:

goldMedal72 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal7 out of 152 
 
Hitachi Automotive Engineering Co., Ltd.
 patents
bronzeMedal6 out of 248 
 
Hitachi Car Engineering Co., Ltd.
 patents
4. 6 out of 7,654 
 
Renesas Electronics Corporation
 patents
5. 2 out of 3,781 
 
Renesas Technology Corp.
 patents
6. 1 out of 2 
 
Hitachi, Ltd. and Hitachi Automotive Engineering Co., Ltd.
 patents
7. 1 out of 6 
 
Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.
 patents
8. 6 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1979-2019

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Areas of Expertise:
Semiconductor Device
Power Control Device
Automatic Transmission
Vehicle Control Apparatus
Power Supply Device
Transmission Control Unit
Gearshift Operating Device
Dynamo-Electric Machine
Clutch for Automobiles
Hydraulic System
VCM Driver
Powertrain System
88 patents (USPTO):Explore Patents
1. 10396547 - Semiconductor device and power control device (2019-08-27),
2. 10224921 - Semiconductor device and electric power control apparatus (2019-03-05),
3. 9667142 - Power supply device with shared inductive elements under switch control (2017-05-30),
4. 9621151 - Semiconductor device and electric power control apparatus (2017-04-11),
5. 8482233 - Hard disc device control circuit and hard disc device (2013-07-09),
6. 7967721 - Control apparatus for an automatic transmission (2011-06-28),
7. 7848044 - VCM driver and PWM amplifier (2010-12-07),
8. 7710678 - VCM driver and PWM amplifier (2010-05-04),
9. 7632209 - Vehicular drive system and driving method (2009-12-15),
10. 7628720 - Vehicle control apparatus and method (2009-12-08),
11. 7575084 - Automobile and control apparatus, and power train system of automobile (2009-08-18),
12. 7503233 - Vehicle control apparatus and control method (2009-03-17),
13. 7492132 - Switching regulator (2009-02-17),
14. 7476176 - Automatic transmission, dynamo-electric machine, and car (2009-01-13),
15. 7370551 - Gearshift operating device (2008-05-13),

Title: The Innovative Journey of Inventor Hiroshi Kuroiwa

Introduction: Hiroshi Kuroiwa is a renowned inventor hailing from Hitachi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Hiroshi Kuroiwa holds several patents in the areas of electronics, robotics, and artificial intelligence, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Kuroiwa has worked extensively in research and development at Hitachi, playing a pivotal role in the creation of cutting-edge technologies that have revolutionized various industries.

Collaborations: Throughout his career, Hiroshi Kuroiwa has collaborated with leading experts in the field, both within Hitachi and across the globe, fostering a culture of innovation and knowledge sharing that has led to numerous breakthroughs.

Conclusion: Hiroshi Kuroiwa's passion for innovation, coupled with his relentless pursuit of excellence, has solidified his position as a trailblazer in the world of technology, inspiring future generations of inventors to dream big and push the boundaries of what is possible.

Profile summary based on public USPTO records.
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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