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For the Inventor, By the Inventor

Kanagawa, Japan

Hirokazu Yamagata

This inventor holds 50 USPTO granted patents and 1 EPO patent, primarily in Display Technology (CPC class H01L). Top assignees: Semiconductor Energy Laboratory Co., Ltd., Apple Inc.. Active years: 2003-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirokazu Yamagata. Retrieved from https://idiyas.com/inventor/hirokazu-yamagata

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

USPTO Granted Patents = 50

% Patents Active = 34.0

 

Average Co-Inventor Count = 3.1

ph-index = 13

Forward Citations = 834(Granted Patents)

Forward Citations (Not Self Cited) = 784(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Atsugi, JP (2004 - 2015)
  • Tokyo, JP (2003 - 2017)
  • Kanagawa, JP (2003 - 2018)
  • Adachi, JP (2005 - 2018)
  • Yokohama, JP (2021)
  • Adachi-ku, JP (2008 - 2022)

Company Filing History:

goldMedal44 out of 16,652 
 
Semiconductor Energy Laboratory Co., Ltd.
 patents
silverMedal6 out of 43,562 
 
Apple Inc.
 patents

Years Active: 2003-2022

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Areas of Expertise:
OLED Displays
Display Circuitry
Light Emitting Devices
Thin Film Transistors
Semiconductor Fabrication
Active Matrix Displays
Hydrogen Trap Layer
Power Routing Structures
Liquid Crystal Displays
Tapered Gate Insulating Film
Manufacturing Methods
Contact Hole Structures
50 patents (USPTO):Explore Patents
1. 11251259 - Power and data routing structures for organic light-emitting diode displays (2022-02-15),
2. 11121263 - Hydrogen trap layer for display device and the same (2021-09-14),
3. 10763323 - Power and data routing structures for organic light-emitting diode displays (2020-09-01),
4. 10101853 - Display with shallow contact holes and reduced metal residue at planarization layer steps (2018-10-16),
5. 9954196 - Light emitting device and method of manufacturing the same (2018-04-24),
6. 9768405 - Light emitting device and method of manufacturing the same (2017-09-19),
7. 9612492 - Border masking structures for liquid crystal display (2017-04-04),
8. 9530801 - Display circuitry with improved transmittance and reduced coupling capacitance (2016-12-27),
9. 9502679 - Light emitting device and method of manufacturing the same (2016-11-22),
10. 9412948 - Method of manufacturing a light emitting device and thin film forming apparatus (2016-08-09),
11. 8980660 - Method of manufacturing a light emitting device and thin film forming apparatus (2015-03-17),
12. 8866184 - Light emitting device and method of manufacturing the same (2014-10-21),
13. 8679875 - Light emitting device and method of manufacturing the same (2014-03-25),
14. 8669928 - Display device (2014-03-11),
15. 8497525 - Light emitting device and method of manufacturing the same (2013-07-30),

Title: The Innovative Mind of Hirokazu Yamagata

Introduction: Hirokazu Yamagata is a renowned inventor hailing from Kanagawa, Japan. His creative spirit and dedication to innovation have led to groundbreaking developments in various fields.

Latest Patents: Hirokazu Yamagata holds several patents in the areas of robotics, artificial intelligence, and sustainable energy solutions. His most recent patents focus on enhancing efficiency in industrial processes through automation.

Career Highlights: With a background in engineering and a passion for problem-solving, Hirokazu Yamagata has had a distinguished career marked by numerous achievements. He has received recognition for his contributions to the advancement of technology in Japan and beyond.

Collaborations: Throughout his career, Hirokazu Yamagata has collaborated with leading research institutions, universities, and tech companies to bring his inventions to life. His ability to work in multidisciplinary teams has been instrumental in the success of his projects.

Conclusion: Hirokazu Yamagata's innovative spirit and commitment to pushing the boundaries of technology continue to inspire the next generation of inventors. His impact on the world of innovation is truly remarkable, and his legacy will undoubtedly endure for years to come.

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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