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For the Inventor, By the Inventor

Naoto Hirosaki

Tsukuba, Japan

Naoto Hirosaki

This inventor holds 104 USPTO granted patents and 11 published patent applications and 48 EPO patents, primarily in Light-Emitting Devices (CPC class C09K11-7734). Top assignees: National Institute for Materials Science, Mitsubishi Chemical Corporation, Sharp Kabushiki Kaisha Corporation. Active years: 1989-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naoto Hirosaki. Retrieved from https://idiyas.com/inventor/naoto-hirosaki

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

USPTO Granted Patents = 104 

% Patents Active = 77.9

 

Average Co-Inventor Count = 2.2

ph-index = 11

Forward Citations = 603(Granted Patents)

Forward Citations (Not Self Cited) = 489(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Yokohama, JP (1989 - 1996)
  • Tsubuka, JP (2013)
  • Tsukaba, JP (2016)
  • Tsukuba, JP (2007 - 2023)
  • Ibaraki, JP (2003 - 2024)

Company Filing History:

goldMedal92 out of 576 
 
National Institute for Materials Science
 patents
silverMedal17 out of 2,426 
 
Mitsubishi Chemical Corporation
 patents
bronzeMedal9 out of 25,974 
 
Sharp Kabushiki Kaisha Corporation
 patents
4. 8 out of 1,874 
 
Fujikura Limited
 patents
5. 7 out of 13,420 
 
Nissan Motor Company Limited
 patents
6. 6 out of 3,262 
 
Nichia Corporation
 patents
7. 5 out of 388 
 
Denka Company Limited
 patents
8. 4 out of 608 
 
Citizen Electronics Co., Ltd.
 patents
9. 4 out of 73 
 
National Institute for Research in Inorganic Materials
 patents
10. 2 out of 475 
 
Denki Kagaku Kogyo Kabushiki Kaisha
 patents
11. 2 out of 1,961 
 
Showa Denko K.k.
 patents
12. 1 out of 227 
 
Futaba Corporation
 patents
13. 1 out of 1,766 
 
National Institute of Advanced Industrial Science and Technology
 patents
14. 1 out of 5 
 
National Institute of Materials Science
 patents
15. 1 out of 49 
 
Phoenix Electric Co., Ltd.
 patents
16. 1 out of 6,964 
 
Sumitomo Chemical Company, Limited
 patents
where one patent can have more than one assignee

Years Active: 1989-2026

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Areas of Expertise:
Phosphor
Light-Emitting Device
Illumination Device
Image Display
Indicator Lamp
Fluorescent Material
Wavelength Converting Member
Production Method
Fluorophore
Ultraviolet Absorber
Luminescent Device
Display Device
104 patents (USPTO):Explore Patents
1. 12742117 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2026-09-22),
2. 12378471 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2025-08-05),
3. 12286575 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2025-04-29),
4. 12281249 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2025-04-21),
5. 12180402 - Fluorescent body, method for manufacturing same, and light-emitting device using same (2024-12-31),
6. 11898080 - Phosphor, method for producing same and light emitting element (2024-02-13),
7. 11891555 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2024-02-06),
8. 11891554 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2024-02-06),
9. 11884857 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2024-01-30),
10. 11884856 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2024-01-30),
11. 11697765 - Phosphor and light-emitting equipment using phosphor (2023-07-11),
12. 11661549 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2023-05-30),
13. 11655416 - Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle (2023-05-23),
14. 11641009 - Light-emitting device (2023-05-02),
15. 11279876 - Phosphor and light-emitting device using same (2022-03-22),

Title: The Innovative Journey of Naoto Hirosaki

Introduction: Naoto Hirosaki is a pioneering inventor based in Tsukuba, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Naoto Hirosaki holds several patents in the areas of LED technology, semiconductor devices, and energy-efficient lighting solutions, showcasing his continuous dedication to pushing the boundaries of technological advancements.

Career Highlights: With a career spanning over two decades, Naoto Hirosaki has worked tirelessly to develop cutting-edge solutions that have revolutionized the way we perceive and utilize lighting technology. His innovative approaches have earned him recognition as a leading figure in the industry.

Collaborations: Throughout his career, Naoto Hirosaki has collaborated with various research institutions, universities, and technology companies to further enhance his inventions and bring them to the market. His collaborative efforts have led to the development of products that have had a significant impact on the industry.

Conclusion: Naoto Hirosaki's relentless pursuit of innovation and his passion for creating transformative technologies have solidified his position as a visionary inventor in the field of LED technology and lighting solutions. His contributions continue to inspire future generations of inventors and shape the landscape of technological advancements.

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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