Sakai, Japan

Kiyoshi Doi

This inventor holds 1 USPTO granted patent. Top assignee: Kubota Corporation. Active years: 1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyoshi Doi. Retrieved from https://idiyas.com/inventor/kiyoshi-doi-7wcick0c

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


% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 1

Forward Citations = 5(Granted Patents)


Company Filing History:


Years Active: 1996

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1 patent (USPTO):Explore Patents

Title: The Innovative Contributions of Kiyoshi Doi

Introduction: Kiyoshi Doi, an accomplished inventor based in Sakai, Japan, has made a significant mark in the field of engineering with his innovative invention. His work is characterized by a unique approach to mechanical systems, particularly in engine design.

Latest Patents: Kiyoshi Doi holds a patent for an "Engine with Mechanical Governor". This innovative design features a bearing boss that protrudes from the front wall of a crankcase, which supports the crankshaft. The engine incorporates interlocking shafts arranged parallel to the crankshaft, along with a crank gear and input gears arranged coplanarly. Notably, balancer shafts are utilized as the interlocking shafts, with governor weights mounted on the input gear, enhancing the mechanical efficiency of the engine.

Career Highlights: Kiyoshi Doi is currently associated with Kubota Corporation, a global leader in manufacturing agricultural machinery and engines. His role in the company allows him to channel his expertise into developing advanced engineering solutions that contribute to the industry's growth and sustainability.

Collaborations: Throughout his career, Kiyoshi has collaborated with notable colleagues, including Keiichi Nakano and Kiyonobu Iida. This teamwork has fostered an environment of innovation and creativity, allowing them to exchange ideas and enhance their contributions to the field.

Conclusion: Kiyoshi Doi's inventive spirit and dedication to engineering continue to drive advancements within the industry. His patent for the engine with mechanical governor stands as a testament to his innovative capabilities and serves as an inspiration for future inventors in the field.

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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