Toyota, Japan

Tadanobu Kumagai

This inventor holds 8 USPTO granted patents. Top assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha. Active years: 1983-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadanobu Kumagai. Retrieved from https://idiyas.com/inventor/tadanobu-kumagai

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


% Patents Active = 87.5

Average Co-Inventor Count = 1.9

ph-index = 6

Forward Citations = 88(Granted Patents)


Location History:

  • Toyota, JP (1983 - 1985)
  • Okazaki, JP (1987 - 2005)

Company Filing History:


Years Active: 1983-2005

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8 patents (USPTO):Explore Patents

Title: Tadanobu Kumagai: Innovator in Automotive Drive Systems

Introduction

Tadanobu Kumagai is a prominent inventor based in Toyota, Japan. He has made significant contributions to the automotive industry, particularly in the development of advanced drive systems. With a total of eight patents to his name, Kumagai's work has had a lasting impact on vehicle performance and efficiency.

Latest Patents

Kumagai's latest patents include a drive system for automotive vehicles of the front-and-rear wheel drive type. This innovative system features a primary drive mechanism for the front road wheels and an ancillary drive mechanism for the rear road wheels. In two-wheel drive mode, the front wheels are powered by the primary mechanism, while both front and rear wheels are engaged in four-wheel drive mode. Additionally, he has developed a drive shaft apparatus for transverse engine vehicles, which includes a pressing mechanism that ensures optimal performance by maintaining the integrity of the bearing within the bracket.

Career Highlights

Throughout his career, Tadanobu Kumagai has worked with Toyota Motor Corporation, where he has been instrumental in advancing automotive technology. His expertise in drive systems has positioned him as a key figure in the company's innovation efforts.

Collaborations

Kumagai has collaborated with notable colleagues such as Masaki Sawabe and Akio Numazawa, contributing to a dynamic team focused on pushing the boundaries of automotive engineering.

Conclusion

Tadanobu Kumagai's contributions to the automotive industry through his innovative patents and collaborative efforts highlight his role as a leading inventor. His work continues to influence the design and functionality of modern vehicles.

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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