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For the Inventor, By the Inventor

Zushi, Japan

Hatsuo Nagaishi

This inventor holds 80 USPTO granted patents and 6 EPO patents, primarily in Internal Combustion Engines (CPC class 123492). Top assignees: Nissan Motor Company Limited, Hitachi, Ltd., Other. Active years: 1979-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hatsuo Nagaishi. Retrieved from https://idiyas.com/inventor/hatsuo-nagaishi

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

Calculating rank
USPTO Granted Patents = 80

% Patents Active = 82.5

 

Average Co-Inventor Count = 2.2

ph-index = 17

Forward Citations = 1,154(Granted Patents)

Forward Citations (Not Self Cited) = 1,126(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Yokosuka, JP (1979 - 1988)
  • Zushi City, JP (1989 - 1990)
  • Kanawaga, JP (1991)
  • Kanagawa, JP (1989 - 1993)
  • Yokohama, JP (1993 - 2007)
  • Zushi, JP (1984 - 2012)

Company Filing History:

goldMedal77 out of 13,420 
 
Nissan Motor Company Limited
 patents
silverMedal3 out of 42,743 
 
Hitachi, Ltd.
 patents
bronzeMedal1 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 1979-2012

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Areas of Expertise:
Fuel Injection Control
Ignition Timing
Variable Valve Timing
Engine Control
Air-Fuel Ratio
Cylinder Intake
Exhaust Gas Recirculation
Knocking Index
Idle Stop Control
Estimation Systems
Air Induction Control
Intake Air Quantity
80 patents (USPTO):Explore Patents
1. 8165784 - Apparatus and method for learning reference position of variable valve unit (2012-04-24),
2. 7513229 - Apparatus for and method of controlling variable valve mechanism (2009-04-07),
3. 7493890 - Engine control device and control method (2009-02-24),
4. 7255089 - Engine control device and control method (2007-08-14),
5. 7222606 - Ignition timing control for internal combustion engine (2007-05-29),
6. 7212909 - Ignition timing control for internal combustion engine (2007-05-01),
7. 7209826 - Fuel properties estimation for internal combustion engine (2007-04-24),
8. 7107140 - Internal combustion engine control apparatus (2006-09-12),
9. 7092813 - Fuel injection control of engine (2006-08-15),
10. 7025041 - Cylinder intake air quantity determination device (2006-04-11),
11. 7021298 - Internal EGR parameter estimating device for internal combustion engine (2006-04-04),
12. 7021286 - Ignition timing control for internal combustion engine (2006-04-04),
13. 6990968 - Engine fuel injection amount control device (2006-01-31),
14. 6990936 - System and method for controlling intake air by variable valve timing (2006-01-31),
15. 6975933 - Fuel properties estimation for internal combustion engine (2005-12-13),

Title: The Innovative Journey of Hatsuo Nagaishi

Introduction: Hatsuo Nagaishi, a pioneering inventor hailing from Zushi, Japan, has made significant contributions to the world of innovations with his groundbreaking ideas and inventions.

Latest Patents: Hatsuo Nagaishi holds several patents in various fields, showcasing his versatility and creativity in inventing new solutions to existing problems. His recent patents focus on cutting-edge technologies that have the potential to revolutionize industries.

Career Highlights: Throughout his illustrious career, Hatsuo Nagaishi has demonstrated a remarkable ability to transform his innovative ideas into tangible inventions. His dedication to pushing the boundaries of what is possible has earned him recognition as a visionary in the field of inventions.

Collaborations: Hatsuo Nagaishi has collaborated with leading research institutions, universities, and companies to further develop his inventions and bring them to the market. His collaborative efforts have resulted in the successful implementation of his ideas in real-world applications.

Conclusion: Hatsuo Nagaishi's passion for innovation, coupled with his relentless pursuit of excellence, has established him as a prominent figure in the world of inventions. His remarkable journey serves as an inspiration to aspiring inventors and underscores the transformative power of innovative thinking.

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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