Utsunomiya, Japan

Tsutomu Ooshima

This inventor holds 1 USPTO granted patent and 1 published patent application. Top assignee: Nec Tokin Tochigi, Ltd.. Active years: 2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Ooshima. Retrieved from https://idiyas.com/inventor/tsutomu-ooshima

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

Calculating rank
USPTO Granted Patents = 1 

% Patents Active = 100.0

Average Co-Inventor Count = 1.0

ph-index = 1

Forward Citations = 9(Granted Patents)


Company Filing History:


Years Active: 2004

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1 patent (USPTO):Explore Patents

Title: Tsutomu Ooshima: Innovator in Sealed Battery Technology

Introduction

Tsutomu Ooshima is a notable inventor based in Utsunomiya, Japan. He has made significant contributions to battery technology, particularly in the development of sealed batteries. His innovative approach addresses common issues faced in battery design, enhancing their performance and reliability.

Latest Patents

Ooshima holds a patent for a sealed battery that effectively reduces swelling or expansion of the battery case during charging. This invention features a battery element of flat shape, which includes a positive electrode and a negative electrode laminated together with a separator. A unique aspect of this design is the recessed portion on the side surface of the battery case, which runs parallel to the flat surface of the battery element. This design innovation helps maintain the integrity of the battery during operation.

Career Highlights

Tsutomu Ooshima is associated with NEC Tokin Tochigi, Ltd., where he has been instrumental in advancing battery technology. His work has contributed to the development of more efficient and safer battery systems, which are crucial in various applications.

Conclusion

Tsutomu Ooshima's contributions to sealed battery technology exemplify the importance of innovation in the field of energy storage. His patented designs not only improve battery performance but also enhance safety, making a significant impact in the industry.

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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