Yokohama, Japan

Eiji Tsumura

This inventor holds 15 USPTO granted patents. Top assignees: Sumitomo Electric Industries, Limited, Sumitomo Electric Device Innovations, Inc.. Active years: 2003-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Eiji Tsumura. Retrieved from https://idiyas.com/inventor/eiji-tsumura

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


% Patents Active = 66.7

Average Co-Inventor Count = 3.5

ph-index = 6

Forward Citations = 82(Granted Patents)


Location History:

  • Yokohama, JP (2003 - 2017)
  • Osaka, JP (2024)

Company Filing History:


Years Active: 2003-2025

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15 patents (USPTO):Explore Patents

Title: Eiji Tsumura: Innovator in Optical Devices

Introduction

Eiji Tsumura is a prominent inventor based in Yokohama, Japan, known for his significant contributions to the field of optical devices. With a total of 15 patents to his name, Tsumura has made remarkable advancements that enhance the functionality and efficiency of optical technologies.

Latest Patents

Among his latest innovations, Tsumura has developed an optical device that includes a light-emitting element, first and second lenses, and an optical component that multiplexes input lights. This device is designed to improve the performance of optical systems. Additionally, he has created an optical transmitter that features a housing with an emission end, a light-emitting element, and a light-receiving element. This transmitter is engineered to monitor output light effectively, utilizing materials with different coefficients of thermal expansion to optimize performance.

Career Highlights

Eiji Tsumura has worked with notable companies such as Sumitomo Electric Industries, Limited and Sumitomo Electric Device Innovations, Inc. His experience in these organizations has allowed him to refine his skills and contribute to cutting-edge optical technologies.

Collaborations

Throughout his career, Tsumura has collaborated with esteemed colleagues, including Kazushige Oki and Hisao Go. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Eiji Tsumura's work in optical devices showcases his dedication to innovation and his ability to push the boundaries of technology. His contributions have significantly impacted the field, and his patents reflect a commitment to advancing optical solutions.

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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