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For the Inventor, By the Inventor

Kanagawa, Japan

Kazuhiko Tokunaga

This inventor holds 10 USPTO granted patents and 3 published patent applications. Top assignee: Sony Corporation. Active years: 1996-2015.

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

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

USPTO Granted Patents = 10 

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 8

Forward Citations = 138(Granted Patents)


Company Filing History:

goldMedal10 out of 58,147 
 
Sony Corporation
 patents

Years Active: 1996-2015

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10 patents (USPTO):Explore Patents
1. 9054197 - Thin-film transistor, display unit, and electronic apparatus (2015-06-09),
2. 8673661 - Display apparatus and method of manufacturing the same (2014-03-18),
3. 8497504 - Thin film transistor and display unit (2013-07-30),
4. 8319226 - Thin film transistor and display device (2012-11-27),
5. 8309956 - Thin film transistor, display unit, and method of manufacturing thin film transistor (2012-11-13),
6. 8269217 - Display unit with thin film transistor having through holes in source/drain electrode (2012-09-18),
7. 6797323 - Method of forming silicon oxide layer (2004-09-28),
8. 5854505 - Process for forming silicon oxide film and gate oxide film for MOS (1998-12-29),
9. 5736462 - Method of etching back layer on substrate (1998-04-07),
10. 5506178 - Process for forming gate silicon oxide film for MOS transistors (1996-04-09),

Title: Kazuhiko Tokunaga: Innovator in Thin-Film Transistor Technology

Introduction

Kazuhiko Tokunaga is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of electronics, particularly in the development of thin-film transistors and display technologies. With a total of 10 patents to his name, Tokunaga's work has had a substantial impact on modern electronic devices.

Latest Patents

Among his latest patents, Tokunaga has developed a thin-film transistor that includes a gate electrode, a gate insulating film, and an oxide semiconductor layer. This innovative design features a channel region that faces the gate electrode and a channel protective layer that enhances the device's performance. Additionally, he has patented a display apparatus that incorporates multiple thin-film transistors and an interconnect region, showcasing his expertise in creating advanced electronic systems.

Career Highlights

Kazuhiko Tokunaga is currently employed at Sony Corporation, where he continues to push the boundaries of technology. His work has been instrumental in advancing the capabilities of electronic devices, making them more efficient and reliable. His dedication to innovation has earned him recognition in the field of electronics.

Collaborations

Throughout his career, Tokunaga has collaborated with notable colleagues, including Toshiaki Arai and Narihiro Morosawa. These partnerships have fostered a creative environment that has led to groundbreaking advancements in technology.

Conclusion

Kazuhiko Tokunaga's contributions to thin-film transistor technology and display systems highlight his role as a leading inventor in the electronics industry. His innovative patents and collaborations continue to shape the future of electronic devices.

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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