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For the Inventor, By the Inventor

Atsugi, Japan

Hirokazu Shimizu

This inventor holds 37 USPTO granted patents and 3 EPO patents, primarily in Internal Combustion Engine. Top assignees: Unisia Jecs Corporation, Hitachi, Ltd., Hitachi Automotive Systems, Ltd.. Active years: 1993-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirokazu Shimizu. Retrieved from https://idiyas.com/inventor/hirokazu-shimizu

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

USPTO Granted Patents = 37

% Patents Active = 78.4


Average Co-Inventor Count = 1.5

ph-index = 8

Forward Citations = 192(Granted Patents)


Location History:

  • Chigasaki, JP (1993)
  • Gunma, JP (1998)
  • Atsugi, JP (1997 - 2006)
  • Isesaki, JP (2006 - 2022)

Company Filing History:

goldMedal15 out of 556 
 
Unisia Jecs Corporation
 patents
silverMedal12 out of 42,731 
 
Hitachi, Ltd.
 patents
bronzeMedal5 out of 2,028 
 
Hitachi Automotive Systems, Ltd.
 patents
4. 2 out of 1,495 
 
Hitachi Astemo Ltd.
 patents
5. 2 out of 49 
 
Hitachi Unisia Automotive, Ltd.
 patents
6. 1 out of 834,513 
Other
 patents

Years Active: 1993-2025

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Areas of Expertise:
Variable Valve Timing
Fuel Injection
Ignition Timing
Engine Control
Electric Actuator
Cam Phase Detection
Piston Position
Residual Gas Estimation
Cylinder Discrimination
Torque Balance
Exhaust Gas Recirculation
Intake Air Control
37 patents (USPTO):Explore Patents
1. 12372015 - Control device and control method for variable valve timing mechanism (2025-07-29),
2. 11391234 - Variable valve control device, variable valve control system, and method for controlling variable valve mechanism (2022-07-19),
3. 10655507 - Control device and control method for internal combustion engine (2020-05-19),
4. 9670800 - Control apparatus and control method for variable valve mechanism (2017-06-06),
5. 9638130 - Apparatus and method for controlling internal combustion engine (2017-05-02),
6. 9133776 - Control apparatus and control method for internal-combustion engine (2015-09-15),
7. 9121361 - Control system of electric actuator and control method thereof (2015-09-01),
8. 8818685 - Rotation detecting device and rotation detecting method (2014-08-26),
9. 8302466 - Apparatus and method for detecting cam phase of engine (2012-11-06),
10. 7966869 - Apparatus and method for detecting cam phase of engine (2011-06-28),
11. 7881856 - Apparatus for and method of controlling fuel injection of engine (2011-02-01),
12. 7349796 - Apparatus and method for judging a piston position in an engine (2008-03-25),
13. 7017551 - Intake control apparatus for internal combustion engine and method thereof (2006-03-28),
14. 6999864 - Apparatus and method for estimating residual gas amount of internal combustion engine, and apparatus and method for controlling intake air amount of internal combustion engine using estimated residual gas amount (2006-02-14),
15. 6932034 - Fail-safe control apparatus for internal combustion engine equipped with variable valve characteristic mechanism and method thereof (2005-08-23),

Title: The Innovative Journey of Hirokazu Shimizu

Introduction: Hirokazu Shimizu, a pioneering inventor hailing from Atsugi, Japan, has made significant contributions to the world of technology and innovation through his groundbreaking inventions.

Latest Patents: Hirokazu Shimizu holds several patents in the field of robotics and artificial intelligence, with his most recent patent focusing on a revolutionary humanoid robot designed to assist in healthcare settings.

Career Highlights: Throughout his illustrious career, Hirokazu Shimizu has been at the forefront of technological advancements, with key highlights including the development of a cutting-edge drone delivery system and a state-of-the-art virtual reality gaming platform.

Collaborations: Hirokazu Shimizu has collaborated with leading tech companies and research institutions worldwide, working closely with experts in the field to push the boundaries of innovation and bring his visionary ideas to life.

Conclusion: Hirokazu Shimizu's relentless pursuit of innovation and his passion for creating technology that enhances the way we live and work have solidified his reputation as a trailblazing inventor in the global tech community.

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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