Tsurugashima, Japan

Tadashi Kumagai

This inventor holds 1 USPTO granted patent. Top assignee: Honda Giken Kogyo Kabushiki Kaisha. Active years: 1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadashi Kumagai. Retrieved from https://idiyas.com/inventor/tadashi-kumagai-e3tzxrug

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 = 6.0

ph-index = 1

Forward Citations = 3(Granted Patents)


Company Filing History:


Years Active: 1984

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1 patent (USPTO):Explore Patents

Title: Innovations of Tadashi Kumagai

Introduction

Tadashi Kumagai is a notable inventor based in Tsurugashima, Japan. He has made significant contributions to the field of internal combustion engines. His innovative work has led to the development of a unique apparatus that enhances engine performance.

Latest Patents

Kumagai holds 1 patent for his invention titled "Secondary air introducing apparatus for internal combustion engine." This apparatus is designed to introduce secondary air into the exhaust manifold of an internal combustion engine. It features a secondary air introducing passage that connects the air cleaner to the exhaust manifold. The design includes a check valve that operates in response to pulsation pressure in the exhaust manifold, ensuring the supply of clean secondary air. Additionally, the apparatus incorporates a first expansion chamber and a second expansion chamber, both strategically placed within the passage to optimize performance.

Career Highlights

Kumagai is associated with Honda Giken Kogyo Kabushiki Kaisha, a leading automotive manufacturer. His work at Honda has allowed him to contribute to advancements in engine technology. His innovative approach has been instrumental in improving the efficiency and performance of internal combustion engines.

Collaborations

Kumagai has collaborated with notable colleagues, including Katsuhisa Amano and Akio Masaki. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Tadashi Kumagai's contributions to the field of internal combustion engines exemplify the spirit of innovation. His patent for the secondary air introducing apparatus showcases his commitment to enhancing engine performance. His work continues to influence the automotive industry and drive technological advancements.

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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