Tokyo, Japan

Koujiro Ohkawa

This inventor holds 13 USPTO granted patents and 2 published patent applications and 1 EPO patent. Top assignee: Dai Nippon Printing Co., Ltd.. Active years: 2004-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koujiro Ohkawa. Retrieved from https://idiyas.com/inventor/koujiro-ohkawa

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

USPTO Granted Patents = 13 

% Patents Active = 69.2

 

Average Co-Inventor Count = 4.1

ph-index = 3

Forward Citations = 40(Granted Patents)


Location History:

  • Tokyo-to, JP (2004 - 2009)
  • Tokyo, JP (2011 - 2022)

Company Filing History:


Years Active: 2004-2025

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13 patents (USPTO):Explore Patents

Title: Koujiro Ohkawa: Innovator in Light Guide Technology

Introduction

Koujiro Ohkawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical technology, particularly in the development of light guide plates. With a total of 13 patents to his name, Ohkawa's work has had a substantial impact on display technology.

Latest Patents

Ohkawa's latest patents include innovations such as a light-guide plate, an area light source device, and a display device. His manufacturing method for the light guide plate aims to suppress the occurrence of uneven luminance. The light guide plate is designed with a light entrance surface for incoming light, a light exit surface for output, and an opposite surface facing the entrance. Notably, the refractive index in the direction perpendicular to the light entrance surface is higher than that in the direction parallel to the light exit surface.

Career Highlights

Koujiro Ohkawa is associated with Dai Nippon Printing Co., Ltd., where he has been instrumental in advancing optical technologies. His innovative approaches have led to the creation of products that enhance visual experiences in various applications.

Collaborations

Ohkawa has worked alongside talented colleagues, including Isao Inoue and Kohei Komizo. Their collaborative efforts have contributed to the successful development of cutting-edge technologies in the field.

Conclusion

Koujiro Ohkawa's contributions to light guide technology exemplify his dedication to innovation. His patents and collaborative work continue to influence the industry, paving the way for future advancements in display technology.

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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