Kanagawa, Japan

Seiichi Ishiduka

This inventor holds 1 USPTO granted patent. Top assignee: Ricoh Company, Ltd.. Active years: 2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiichi Ishiduka. Retrieved from https://idiyas.com/inventor/seiichi-ishiduka

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 = 3.0

ph-index = 1


Company Filing History:


Years Active: 2020

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1 patent (USPTO):Explore Patents

Title: Seiichi Ishiduka: Patent Inventor at Ricoh

Introduction

Seiichi Ishiduka is an inventor associated with Ricoh Company, Ltd., in Kanagawa, Japan. His recorded patent work concerns power supply control for conveyance and image-forming equipment.

Latest Patents

Ishiduka is credited with 1 patent: “Power Supply Device, Conveyance Apparatus, and Image Forming Apparatus.” The invention describes a power supply line that delivers voltage from a first power supply unit to a load, along with control circuitry and a switch connected to a second power supply unit. The circuitry starts voltage supply according to the switch’s state and whether the power-line voltage falls below specified thresholds. When the switch changes from open to closed, a higher threshold applies.

Career Highlights

The available information identifies Ishiduka’s work with Ricoh Company, Ltd., and highlights his contribution to power supply technology for apparatus used in conveyance and image formation.

Collaborations

Hirohito Murate and Masato Kobayashi are listed as Ishiduka’s coworkers. The provided information does not specify their roles in the patent.

Conclusion

Seiichi Ishiduka’s recorded patent reflects an engineering contribution to controlled power delivery in conveyance and image-forming apparatus.

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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