Hitachi, Japan

Tomoaki Utsumi

This inventor holds 18 USPTO granted patents and 5 EPO patents, primarily in Switchgear Technology. Top assignees: Hitachi, Ltd., Japan Ae Power Systems Corporation. Active years: 1993-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomoaki Utsumi. Retrieved from https://idiyas.com/inventor/tomoaki-utsumi

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 50.0

 

Average Co-Inventor Count = 5.2

ph-index = 5

Forward Citations = 92(Granted Patents)


Location History:

  • Chiyoda-ku, JP (2005 - 2007)
  • Hitachi, JP (1993 - 2015)
  • Tokyo, JP (2016)

Company Filing History:


Years Active: 1993-2016

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Areas of Expertise:
Switch Unit
Switchgear
Vacuum Switchgear
Gas-Insulated Switchgear
Fault Location
Gas Circuit Breaker
Insulation Gas
Power Apparatus
Gas Insulating Apparatus
Failure Rating
Gas Insulated Device
18 patents (USPTO):Explore Patents

Title: Tomoaki Utsumi: Innovator in Switching Technology

Introduction

Tomoaki Utsumi is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of switching technology, holding a total of 18 patents. His work focuses on enhancing the performance and efficiency of switching units and gear.

Latest Patents

One of Utsumi's latest patents is a switching unit or switching gear designed to improve heat radiation performance while minimizing the need for increased unit size. This innovative switching unit includes a switch and insulating resin that covers the periphery of the switch. The switch consists of a fixed electrode and a movable electrode that moves axially to make or break contact. Additionally, the insulating resin features fins on its outer surface, which help maintain a consistent distance between the switch's periphery and the fins' bottoms. Another notable patent involves a switch unit that comprises multiple switches arranged linearly, where the movable electrode of one switch is electrically connected to the fixed electrode of another.

Career Highlights

Throughout his career, Utsumi has worked with notable companies such as Hitachi, Ltd. and Japan AE Power Systems Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in switching technology.

Collaborations

Utsumi has collaborated with several talented individuals in his field, including Fumihiro Endo and Kenji Tsuchiya. These collaborations have contributed to the advancement of his projects and the successful development of his patents.

Conclusion

Tomoaki Utsumi is a distinguished inventor whose work in switching technology has led to numerous patents and innovations. His contributions continue to impact the industry positively, showcasing the importance of creativity and collaboration in technological advancement.

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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