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For the Inventor, By the Inventor

Tokyo, Japan

Hiroaki Toyoshima

This inventor holds 13 USPTO granted patents and 21 published patent applications and 1 EPO patent. Top assignees: Denka Company Limited, Idemitsu Kosan., Ltd., National Institute for Materials Science. Active years: 2016-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroaki Toyoshima. Retrieved from https://idiyas.com/inventor/hiroaki-toyoshima-2fzc9pjz

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

Calculating rank
USPTO Granted Patents = 13 

% Patents Active = 69.2


Average Co-Inventor Count = 2.7

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:

goldMedal7 out of 388 
 
Denka Company Limited
 patents
silverMedal6 out of 92 
 
Idemitsu Kosan., Ltd.
 patents
bronzeMedal1 out of 576 
 
National Institute for Materials Science
 patents
where one patent can have more than one assignee

Years Active: 2016-2026

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13 patents (USPTO):Explore Patents
1. 12772685 - Organic electroluminescent element, organic electroluminescent display apparatus, and electronic device (2026-10-20),
2. 12772655 - Organic electroluminescent element and electronic device (2026-10-20),
3. 12757568 - Organic electroluminescence device, light emitting device, organic electroluminescence display device and electronic device (2026-10-06),
4. 12735639 - Phosphor powder, wavelength conversion body, and light emitting device (2026-09-15),
5. 12673934 - Compound, material for an organic electroluminescence device and an organic electroluminescence device comprising the compound (2026-07-07),
6. 12648353 - Composition, organic electroluminescence device, and electronic apparatus (2026-06-02),
7. 12538638 - Organic electroluminescent element and electronic device (2026-01-27),
8. 12256579 - Phosphor, method of producing phosphor, light-emitting element, light-emitting device, and image display apparatus (2025-03-18),
9. 12006459 - Phosphor powder and light emitting device (2024-06-11),
10. 11952520 - Method for manufacturing phosphor powder, phosphor powder, and light emitting device (2024-04-09),
11. 11279876 - Phosphor and light-emitting device using same (2022-03-22),
12. 10093854 - Phosphor and light emitting device (2018-10-09),
13. 9309460 - Phosphor, method for producing same, and use of same (2016-04-12),

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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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