Yawata, Japan

Kouichi Doi

This inventor holds 1 USPTO granted patent. Top assignee: Kabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho. Active years: 1981.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kouichi Doi. Retrieved from https://idiyas.com/inventor/kouichi-doi-44hvrq7s

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 = 5.0

ph-index = 1

Forward Citations = 18(Granted Patents)


Company Filing History:


Years Active: 1981

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1 patent (USPTO):Explore Patents

Title: Kouichi Doi: Particle Classification Apparatus Inventor.

Introduction

Kouichi Doi is an inventor associated with Yawata, Japan, and Kabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho. His work includes an invention for classifying particles.

Latest Patents

The available information lists one patent for Doi: “Apparatus for Classifying Particles.” The apparatus has a main body with separate outlets for fine and coarse particles, along with a classifying fan wheel. A first gas inlet channel supplies particles with a gas stream. A gas-passing member has numerous inlets oriented toward the fan wheel’s direction of rotation, while a second gas inlet channel supplies gas to the space between that member and the main body’s inner wall. The design supports the classification of particles into fine and coarse fractions.

Career Highlights

Doi’s listed patent reflects work on particle-classification equipment. The available information associates him with Kabushiki Kaisha Hosokawa Funtai Kogaku Kenkyusho and records 1 patent.

Collaborations

Masuo Hosokawa and Katsuya Mizui are identified as Doi’s coworkers.

Conclusion

Kouichi Doi’s recorded invention is a particle-classification apparatus designed to separate fine and coarse particles using a fan wheel and controlled gas flows.

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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