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For the Inventor, By the Inventor

Toyota, Japan

Keiko Hasegawa

This inventor holds 13 USPTO granted patents and 4 EPO patents. Top assignee: Toyota Jidosha Kabushiki Kaisha. Active years: 2003-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiko Hasegawa. Retrieved from https://idiyas.com/inventor/keiko-hasegawa

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

USPTO Granted Patents = 13

% Patents Active = 23.1


Average Co-Inventor Count = 5.5

ph-index = 6

Forward Citations = 71(Granted Patents)


Location History:

  • Susono, JP (2003)
  • Toyota, JP (2006 - 2012)

Company Filing History:

goldMedal13 out of 38,912 
 
Toyota Jidosha Kabushiki Kaisha
 patents

Years Active: 2003-2026

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13 patents (USPTO):Explore Patents
1. 12734925 - Server and system for supporting an electrified vehicle (2026-09-15),
2. 8108089 - Vehicle and control method thereof (2012-01-31),
3. 7971668 - Hybrid vehicle and control method of the same (2011-07-05),
4. 7814743 - Control apparatus for internal combustion engine (2010-10-19),
5. 7610954 - Cooling system, control method of the same, and motor vehicle (2009-11-03),
6. 7380537 - Control apparatus for vehicle (2008-06-03),
7. 7353798 - Fuel supply system for internal combustion engine (2008-04-08),
8. 7316219 - Control apparatus for vehicle (2008-01-08),
9. 7281509 - Internal combustion engine system and starting method of internal combustion engine (2007-10-16),
10. 7263972 - Fuel supply system for internal combustion engine (2007-09-04),
11. 7249589 - Hybrid vehicle and method for controlling hybrid vehicle (2007-07-31),
12. 7150254 - Auto start-stop device for internal combustion engine and motor vehicle equipped with auto start-stop device (2006-12-19),
13. 6655359 - Method of operating vehicular internal combustion engine of an intermittent-operation type (2003-12-02),

Title: Keiko Hasegawa: Innovator in Automotive Technology

Introduction

Keiko Hasegawa is a prominent inventor based in Toyota, Japan. She has made significant contributions to the automotive industry, particularly in the field of vehicle control systems. With a total of 13 patents to her name, Hasegawa's work has been instrumental in advancing hybrid vehicle technology.

Latest Patents

Hasegawa's latest patents include innovative methods for vehicle control. One of her notable inventions is a control method for vehicles during idling operations. This method involves setting a learning-determination flag when the engine is idling, allowing for improved control of the idling value under specific transmission conditions. Another significant patent focuses on hybrid vehicles, detailing a control method that optimizes engine and motor performance based on deceleration demands while managing fuel cut scenarios effectively.

Career Highlights

Hasegawa has built her career at Toyota Jidosha Kabushiki Kaisha, where she has been able to apply her expertise in automotive technology. Her work has not only contributed to the company's innovations but has also positioned her as a key figure in the development of advanced vehicle systems.

Collaborations

Throughout her career, Hasegawa has collaborated with notable colleagues, including Mamoru Tomatsuri and Toshio Inoue. These collaborations have fostered a creative environment that has led to groundbreaking advancements in automotive technology.

Conclusion

Keiko Hasegawa's contributions to the automotive industry exemplify her dedication to innovation and excellence. Her patents reflect her commitment to enhancing vehicle performance and efficiency. Hasegawa continues to be a driving force in the evolution of automotive technology.

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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