Yokohama, Japan

Jyouji Katoh

This inventor holds 1 USPTO granted patent. Top assignee: Ricoh Company, Ltd.. Active years: 1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Jyouji Katoh. Retrieved from https://idiyas.com/inventor/jyouji-katoh

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 = 1(Granted Patents)


Company Filing History:


Years Active: 1998

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1 patent (USPTO):Explore Patents

Title: Jyouji Katoh and His Duplex Copier Invention.

Introduction

Jyouji Katoh is an inventor associated with Yokohama, Japan, and Ricoh Company, Ltd. His recorded patent concerns a copier designed to improve the speed and productivity of duplex copying. Katoh is credited with 1 patent.

Latest Patents

Katoh’s patent, “Copier,” describes a photocopier with a duplex copy unit that cannot stack multiple recording media. The invention coordinates document scanning and paper feeding to reduce the time needed to reproduce images on both sides of recording media.

The scanner first reads the first document, then alternates between reading the first and second documents, and finally reads the second document. At the same time, the copier feeds one recording medium from the main feed device, alternates feeding individual media from the main feed device and duplex unit, and finishes by feeding one medium from the duplex unit. This coordinated sequence is intended to enhance copier productivity.

Career Highlights

Katoh’s documented patent work is associated with Ricoh Company, Ltd., a company known for imaging and office equipment. His copier invention addresses the practical challenge of efficiently producing double-sided copies when the duplex unit cannot hold a stack of recording media.

Collaborations

Katoh’s listed coworkers include Fumio Kawamura and Jun Doi. Their names provide context for the professional connections associated with his work.

Conclusion

Jyouji Katoh’s recorded contribution is a duplex copier design that coordinates scanning and media feeding to shorten copying time and improve productivity.

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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