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For the Inventor, By the Inventor

Yokohama, Japan

Nobutaka Akashi

This inventor holds 26 USPTO granted patents and 6 published patent applications and 5 EPO patents, primarily in Organic Electroluminescence. Top assignees: Samsung Display Co., Ltd., Hokkaido University, Kyushu University. Active years: 2015-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobutaka Akashi. Retrieved from https://idiyas.com/inventor/nobutaka-akashi

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

USPTO Granted Patents = 26 

% Patents Active = 100.0

 

Average Co-Inventor Count = 2.4

ph-index = 3

Forward Citations = 33(Granted Patents)


Location History:

  • Fukuoka, JP (2023)
  • Yokohama, JP (2015 - 2024)

Company Filing History:

goldMedal24 out of 27,288 
 
Samsung Display Co., Ltd.
 patents
silverMedal2 out of 442 
 
Hokkaido University
 patents
bronzeMedal2 out of 455 
 
Kyushu University
 patents
4. 1 out of 2,321 
 
Samsung Display Co., Ltd.
 patents
5. 1 out of 291 
 
Samsung Displayco., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 2015-2026

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Areas of Expertise:
Organic Electroluminescent Device
Polycyclic Compound
Nitrogen-Containing Compound
Thermally Activated Delayed Fluorescence
Aromatic Compound
Heterocyclic Compound
Electroluminescent Material
Multinuclear Copper(I) Complex
26 patents (USPTO):Explore Patents
1. 12550609 - Material for organic electroluminescent device and organic electroluminescent device including the same (2026-02-10),
2. 12520722 - Nitrogen-containing compound and organic electroluminescence device including the same (2026-01-06),
3. 12421256 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2025-09-23),
4. 12289991 - Organic electroluminescence device (2025-04-29),
5. 12069946 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2024-08-20),
6. 11889752 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2024-01-30),
7. 11844272 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2023-12-12),
8. 11527726 - Organic electroluminescence device and compound for organic electroluminescence device (2022-12-13),
9. 11502259 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2022-11-15),
10. 11393985 - Organic electroluminescence device and polycyclic compound for organic electroluminescence device (2022-07-19),
11. 11174427 - Aromatic compound and organic electroluminescence device including the same (2021-11-16),
12. 11050025 - Material for organic electroluminescent device and organic electroluminescent device including the same (2021-06-29),
13. 11018306 - Compound for thermally activated delayed fluorescence and organic electroluminescence device including the same (2021-05-25),
14. 10886476 - Polycyclic compound and organic electroluminescence device including the same (2021-01-05),
15. 10862050 - Heterocyclic compound and organic electroluminescence device including the same (2020-12-08),

Title: **Nobutaka Akashi: A Pioneer in Organic Electroluminescence Devices**

Introduction

Nobutaka Akashi, based in Yokohama, Japan, is a distinguished inventor who has made significant contributions to the field of organic electroluminescence devices. With a remarkable portfolio of 22 patents, Akashi's innovative work continues to influence advancements in display technologies.

Latest Patents

Akashi's recent patents include groundbreaking inventions related to organic electroluminescence devices and polycyclic compounds for such devices. One notable patent describes an organic electroluminescence device that features a first electrode and a hole transport region situated on this electrode. An emission layer and an electron transport region are also integral to the structure. Notably, the emission layer includes a polycyclic compound represented by a specific formula that enhances emission efficiency, with elements such as Y being either oxygen or sulfur. Another patent highlights a high-efficiency organic electroluminescence device design, which has gained attention for its innovative incorporation of polycyclic compounds to optimize light emission.

Career Highlights

Throughout his illustrious career, Nobutaka Akashi has held positions at leading organizations, including Samsung Display Co., Ltd. and the National University Corporation Hokkaido University. These roles have facilitated his research and experimentation in advanced materials for display technologies, greatly contributing to his patent portfolio and stature as an inventor.

Collaborations

Akashi has collaborated with esteemed colleagues such as Hiroaki Itoi and Naoya Sakamoto, whose joint efforts have propelled their research initiatives in organic electronics and refined the scientific understanding of electroluminescent materials.

Conclusion

Nobutaka Akashi's innovative contributions and numerous patents have had a profound impact on the field of organic electroluminescence devices. As technology continues to evolve, Akashi remains a crucial figure in the advancement of efficient and effective display systems, ensuring that his work will influence future generations of inventors and researchers alike.

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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