Hitachi, Japan

Tosio Isikawa

This inventor holds 1 USPTO granted patent. Top assignee: Hitachi, Ltd.. Active years: 1977.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tosio Isikawa. Retrieved from https://idiyas.com/inventor/tosio-isikawa

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 = 3.0

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:


Years Active: 1977

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1 patent (USPTO):Explore Patents

Title: Tosio Isikawa: Innovator in Electric Power Protection

Introduction

Tosio Isikawa is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of electric power apparatuses, particularly in enhancing their protective measures against surge voltages.

Latest Patents

Isikawa holds a patent for a protective gas cap designed for electric power apparatuses. This innovation addresses the challenges posed by spark gap apparatuses at electric power substations. The patent details how the spark voltage versus spark time characteristic can vary based on the polarity of the surge voltage, which can compromise the protective performance of the spark gap apparatus. His invention aims to improve this performance by equalizing the maximum electric field developed between the electrodes forming the spark gap.

Career Highlights

Throughout his career, Isikawa has been associated with Hitachi, Ltd., where he has worked on various projects related to electric power systems. His expertise in this area has led to advancements that enhance the reliability and safety of electric power transmission.

Collaborations

Isikawa has collaborated with notable colleagues, including Takehiro Kikuchi and Jun Ozawa. Their combined efforts have contributed to the development of innovative solutions in the electric power sector.

Conclusion

Tosio Isikawa's work in the field of electric power protection exemplifies the importance of innovation in safeguarding electrical systems. His contributions continue to influence the industry and enhance the safety of electric power apparatuses.

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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