Tokyo, Japan

Hiroshi Ookuma

This inventor holds 3 USPTO granted patents and 2 published patent applications and 4 EPO patents. Top assignees: Hodogaya Chemical Co., Ltd., Kyulux, Inc.. Active years: 2017-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Ookuma. Retrieved from https://idiyas.com/inventor/hiroshi-ookuma

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

USPTO Granted Patents = 3 

% Patents Active = 100.0

 

Average Co-Inventor Count = 5.0

ph-index = 1

Forward Citations = 1(Granted Patents)


Company Filing History:


Years Active: 2017-2021

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3 patents (USPTO):Explore Patents

Title: Hiroshi Ookuma: Innovator in Organic Electroluminescent Devices

Introduction

Hiroshi Ookuma is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of organic electroluminescent devices, holding a total of 3 patents. His work focuses on developing materials that enhance the efficiency and performance of these devices.

Latest Patents

Hiroshi Ookuma's latest patents include a spiro compound featuring an azafluorene ring structure. This compound serves as a material for high-efficiency organic electroluminescent devices, providing both fluorescence and delayed fluorescence. Additionally, he has developed a compound with an indolocarbazole ring structure, which is utilized in creating highly efficient and durable organic electroluminescent devices. This compound is characterized by excellent hole injection and transport capabilities, along with strong electron blocking power and stability in thin film form.

Career Highlights

Throughout his career, Hiroshi Ookuma has worked with notable companies such as Hodogaya Chemical Co., Ltd. and Kyulux, Inc. His expertise in organic materials has positioned him as a key player in the development of advanced electroluminescent technologies.

Collaborations

Hiroshi Ookuma has collaborated with esteemed colleagues, including Norimasa Yokoyama and Shuichi Hayashi. These partnerships have furthered his research and innovation in the field of organic electronics.

Conclusion

Hiroshi Ookuma's contributions to organic electroluminescent devices highlight his role as a leading inventor in this specialized area. His innovative patents and collaborations continue to influence advancements in 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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