Toyota, Japan

Hiroshi Itoh

This inventor holds 69 USPTO granted patents and 1 EPO patent, primarily in Hydraulic Control Systems (CPC class 7486). Top assignees: Toyota Jidosha Kabushiki Kaisha, Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1982-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Itoh. Retrieved from https://idiyas.com/inventor/hiroshi-itoh-6uubxwhn

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

Calculating rank

% Patents Active = 100.0


Average Co-Inventor Count = 3.1

ph-index = 23

Forward Citations = 3,740(Granted Patents)

Forward Citations (Not Self Cited) = 3,725(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Nagoya, JP (1982 - 1984)
  • Ohbu, JP (1986)
  • Oubu, JP (1986 - 1987)
  • Oobu, JP (1987)
  • Obu, JP (1987 - 1988)
  • Ichinomiya, JP (1993)
  • Toyota, JP (1984 - 2001)

Company Filing History:


Years Active: 1982-2001

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Areas of Expertise:
Hybrid Drive System
Hydraulic Control Apparatus
Automatic Transmission
Four Wheel Drive
Power Transmission
Continuously Variable Transmission
Accumulator Control Device
Cruise Control
Dazzle-Free Mirror
Planetary Gear Transmission
Torque Distribution Clutch
Liquid Crystal Element
69 patents (USPTO):Explore Patents

Title: Hiroshi Itoh: An Innovator in Hybrid Technology and Advanced Pigments

Introduction

Hiroshi Itoh, an esteemed inventor based in Toyota, Japan, has made significant contributions to the fields of hybrid technology and pigments. With a remarkable portfolio of 69 patents, Itoh has been at the forefront of developing innovative solutions that enhance both automotive performance and aesthetic appeal.

Latest Patents

Among his latest inventions is a sophisticated hybrid drive system. This groundbreaking system features a torque amplify mechanism that integrates the output from both an internal combustion engine and an electric motor. By controlling the torque of the electric motor, the system effectively amplifies the output torque, facilitating enhanced performance. Additionally, the hybrid drive system incorporates a continuously variable transmission, which adjusts the torque input, and a forward/backward switching mechanism that allows for efficient directional control.

Itoh's innovative work extends to pigments, where he has disclosed a new pigment along with its production process that significantly improves weather resistance. This pigment, characterized by a transparent scaly substrate with a titanium dioxide layer, produces a notable metallic glossy effect and strong interference colors. The process involves sputtering techniques and the application of chromium (III) hydroxide, resulting in a high-quality pigment suited for automotive topcoat paints.

Career Highlights

Hiroshi Itoh has built an impressive career with notable positions at Toyota Motor Corporation and Nippondenso Co., Ltd. These experiences have allowed him to leverage his skills in engineering and innovation to contribute to the advancement of hybrid technologies and specialized materials.

Collaborations

Throughout his career, Itoh has collaborated with esteemed colleagues such as Mitsuru Takada and Tokuyuki Takahashi. Their teamwork has resulted in the successful development and patenting of various technologies that continue to impact the automotive industry.

Conclusion

In conclusion, Hiroshi Itoh stands out as a key figure in the innovation landscape, particularly within the realms of hybrid systems and advanced pigments. His extensive array of patents showcases his dedication to improving technology and materials, reflecting a career marked by ingenuity and collaboration. As the automotive industry evolves, Itoh's contributions will undoubtedly play a significant role in shaping its future.

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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