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For the Inventor, By the Inventor

Nagoya, Japan

Yoshiharu Inaguma

This inventor holds 24 USPTO granted patents, primarily in Power Steering Technology. Top assignees: Toyoda Koki Kabushiki Kaisha, Jtekt Corporation, Toyota Jidosha Kabushiki Kaisha. Active years: 1980-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiharu Inaguma. Retrieved from https://idiyas.com/inventor/yoshiharu-inaguma

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

USPTO Granted Patents = 24

% Patents Active = 79.2

Average Co-Inventor Count = 3.5

ph-index = 9

Forward Citations = 284(Granted Patents)


Location History:

  • Kariya, JP (1986 - 2007)
  • Nagoya, JP (1980 - 2009)

Company Filing History:

goldMedal21 out of 629 
 
Toyoda Koki Kabushiki Kaisha
 patents
silverMedal2 out of 2,468 
 
Jtekt Corporation
 patents
bronzeMedal2 out of 38,970 
 
Toyota Jidosha Kabushiki Kaisha
 patents
4. 1 out of 1,838 
 
Toyota Jidosha Kogyo Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1980-2009

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Areas of Expertise:
Power Steering
Hydraulic Systems
Variable Displacement Pump
Electronic Control
Motor Vehicle
Flow Control
Vane Type Pump
Control System
Pump Apparatus
Assisted Steering
Hydraulic Bearing
Drive Force Input
24 patents (USPTO):Explore Patents
1. 7581618 - Transmission ratio variable steering device (2009-09-01),
2. 7303045 - Motor vehicle steering device (2007-12-04),
3. 7128542 - Variable displacement pump (2006-10-31),
4. 6973990 - Electronic control power steering device (2005-12-13),
5. 6938724 - Motor vehicle steering device (2005-09-06),
6. 6497565 - Pump apparatus having drive force input portion aligned with pump shaft bearing member (2002-12-24),
7. 6491130 - Electric power steering apparatus (2002-12-10),
8. 6216815 - Power steering apparatus (2001-04-17),
9. 6071013 - Hydraulic bearing device (2000-06-06),
10. 6041807 - Flow control device of power steering apparatus (2000-03-28),
11. 5651423 - Power steering apparatus (1997-07-29),
12. 5577573 - Hydraulic power steering apparatus (1996-11-26),
13. 5558177 - Power steering apparatus (1996-09-24),
14. 5515938 - Hydraulic power steering apparatus (1996-05-14),
15. 5439070 - Hydraulic power steering apparatus (1995-08-08),

Title: Innovator Spotlight: Yoshiharu Inaguma

Introduction:

Yoshiharu Inaguma is a prolific inventor based in Nagoya, Japan, with an impressive portfolio of 24 patents to his name. His innovative spirit and dedication to creating space-saving and reliable mechanisms have set him apart in the field of automotive engineering.

Latest Patents:

Yoshiharu Inaguma's latest patents showcase his ingenuity in designing transmission ratio variable steering devices and motor vehicle steering devices. These inventions focus on eliminating the need for spiral cables, thus improving efficiency and reducing the risk of potential drawbacks associated with traditional mechanisms.

Career Highlights:

Inaguma has made significant contributions to the automotive industry through his work at companies such as Toyoda Koki Kabushiki Kaisha and Toyota Jidosha Kabushiki Kaisha. His expertise in developing cutting-edge steering technologies has earned him recognition as a leading innovator in the field.

Collaborations:

Throughout his career, Yoshiharu Inaguma has collaborated with talented individuals such as Susumu Honaga and Mikio Suzuki. Together, they have combined their skills and knowledge to push the boundaries of automotive engineering and create groundbreaking solutions for the industry.

Conclusion:

Yoshiharu Inaguma's innovative approach to steering device design has revolutionized the automotive sector, providing solutions that are not only space-saving but also highly reliable. His dedication to advancing technology and enhancing user experience underscores his status as a visionary inventor shaping the future of the automotive industry.

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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