Nagoya, Japan

Koyo Yamashita

This inventor holds 1 USPTO granted patent. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koyo Yamashita. Retrieved from https://idiyas.com/inventor/koyo-yamashita

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 = 16(Granted Patents)


Company Filing History:


Years Active: 1991

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1 patent (USPTO):Explore Patents

Title: Koyo Yamashita and Pulse-Width Modulation Inverter Technology.

Introduction

Koyo Yamashita is an inventor associated with Nagoya, Japan, and Mitsubishi Denki Kabushiki Kaisha. His patent work addresses control methods for pulse-width modulation inverter apparatuses.

Latest Patents

The supplied information lists one patent for Yamashita: “Pulse-width modulation type inverter apparatus.” The invention concerns preventing short circuits between controllable switching elements in an inverter that produces alternating-current voltage with variable amplitude or frequency. Its control system selects signals based on current-detector readings and whether each switching element contributes to generating the output current, then uses the selected signals to drive the switching elements. The record lists 1 patent.

Career Highlights

Yamashita’s listed patent reflects work on inverter control and switching-element protection. The supplied information associates him with Mitsubishi Denki Kabushiki Kaisha.

Collaborations

Masayuki Katto is identified as Yamashita’s coworker in the supplied information.

Conclusion

Koyo Yamashita’s documented invention focuses on improving pulse-width modulation inverter control to help prevent short circuits between switching elements.

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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