Bunkyo, Japan

Testuo Yamagata

This inventor holds 1 USPTO granted patent. Top assignee: Honda Giken Kogyo Kabushiki Kaisha. Active years: 1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Testuo Yamagata. Retrieved from https://idiyas.com/inventor/testuo-yamagata

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 = 2.0

ph-index = 1

Forward Citations = 24(Granted Patents)


Company Filing History:


Years Active: 1989

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1 patent (USPTO):Explore Patents

Title: Testuo Yamagata: Inventor of an Automotive Cruise-Control Device

Introduction

Testuo Yamagata is an inventor associated with Bunkyo, Japan, and Honda Giken Kogyo Kabushiki Kaisha, commonly known as Honda. His listed patent concerns a constant-speed running control device for automobiles and motorcycles.

Latest Patents

Yamagata is credited with 1 patent: “Constant speed running control device for automobile.” The invention enables a vehicle to maintain a selected speed automatically. It also describes an improved cancellation system that can disengage automatic speed control when the throttle closes beyond a specified amount within a set period, or when irregular engine combustion occurs at low operating speeds.

Career Highlights

The available information connects Yamagata’s patent work with Honda and highlights his contribution to vehicle speed-control technology. The patent addresses both automatic speed maintenance and conditions for safely canceling that operation.

Collaborations

Yamagata’s listed coworker is Shoji Yamashita. Their association is noted in connection with the patent information provided.

Conclusion

Testuo Yamagata’s recorded invention focuses on practical cruise-control operation and cancellation, reflecting an effort to make automatic speed regulation more responsive to vehicle and engine conditions.

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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