Tokyo, Japan

Keiji Tokunaga

This inventor holds 3 USPTO granted patents. Top assignee: Dai Nippon Printing Co., Ltd.. Active years: 2005-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Tokunaga. Retrieved from https://idiyas.com/inventor/keiji-tokunaga

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


% Patents Active = 33.3

Average Co-Inventor Count = 3.3

ph-index = 3

Forward Citations = 44(Granted Patents)


Company Filing History:


Years Active: 2005-2008

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3 patents (USPTO):Explore Patents

Title: Keiji Tokunaga: Innovator in Gas Barrier Technology

Introduction

Keiji Tokunaga is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of gas barrier technology, holding a total of 3 patents. His work focuses on developing substrates that enhance gas barrier properties, which are crucial in various applications.

Latest Patents

One of Tokunaga's latest patents is a gas barrier substrate designed to provide high gas barrier properties without any ruggedness or pinholes in the gas barrier layer. This invention addresses the challenges associated with gas permeability by incorporating a base material, a planarization layer, and a gas barrier layer formed from a deposition film. This innovative approach ensures that the substrate maintains its integrity while effectively preventing gas transmission.

Career Highlights

Tokunaga has established a successful career at Dai Nippon Printing Co., Ltd., where he has been instrumental in advancing the company's research and development efforts in gas barrier technologies. His expertise and innovative mindset have positioned him as a key player in the industry.

Collaborations

Throughout his career, Tokunaga has collaborated with talented individuals such as Minoru Komada and Sayaka Kawashima. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Keiji Tokunaga's contributions to gas barrier technology exemplify his dedication to innovation and excellence. His patents reflect a commitment to solving complex problems in the field, making him a noteworthy figure in the world of inventions.

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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