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For the Inventor, By the Inventor

Gifu, Japan

Yoshio Okayama

This inventor holds 50 USPTO granted patents and 17 published patent applications and 1 EPO patent, primarily in Group III Nitride Semiconductors. Top assignees: Sanyo Electric Co., Ltd., Panasonic Intellectual Property Management Co., Ltd., Panasonic Holdings Corporation. Active years: 2004-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshio Okayama. Retrieved from https://idiyas.com/inventor/yoshio-okayama

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 = 78.0

 

Average Co-Inventor Count = 3.2

ph-index = 7

Forward Citations = 160(Granted Patents)

Forward Citations (Not Self Cited) = 155(Dec 10, 2025)


Location History:

  • Ogaki, JP (2004 - 2007)
  • Brookline, MA (US) (2007 - 2012)
  • Moriguchi, JP (2012)
  • Gifu, JP (2004 - 2013)
  • Moriyama, JP (2013)
  • Sunnyvale, CA (US) (2008 - 2015)
  • Shiga, JP (2016)
  • Osaka, JP (2018 - 2024)

Company Filing History:

goldMedal27 out of 8,782 
 
Sanyo Electric Co., Ltd.
 patents
silverMedal10 out of 13,338 
 
Panasonic Intellectual Property Management Co., Ltd.
 patents
bronzeMedal7 out of 366 
 
Panasonic Holdings Corporation
 patents
4. 6 out of 1,041 
 
Osaka University
 patents
5. 3 out of 16,454 
 
Panasonic Corporation
 patents
6. 2 out of 467 
 
Fujitsu Microelectronics Limited
 patents
7. 2 out of 53,250 
 
Kabushiki Kaisha Toshiba
 patents
8. 2 out of 36,676 
 
Nec Corporation
 patents
9. 1 out of 4 
 
Itochu Plastics Inc.
 patents
10. 1 out of 39 
 
Kanto Sanyo Semiconductors Co., Ltd.
 patents
11. 1 out of 3,720 
 
Semiconductor Components Industries, LLC
 patents
12. 2 out of 834,453 
Other
 patents
where one patent can have more than one assignee

Years Active: 2004-2025

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Areas of Expertise:
Group III Nitride
Semiconductor Module
Crystal Growth
Substrate Manufacturing
Optical Pickup Device
Power Semiconductor
Device Mounting Board
RAMO4 Substrate
Nucleation Step
Lateral Growth
Flat Thick Film
Manufacturing Method
50 patents (USPTO):Explore Patents
1. 12282199 - Light emitting device, manufacturing method therefor, and waveguide structure (2025-04-21),
2. 12049710 - Group-III nitride substrate (2024-07-30),
3. 11795573 - Method of manufacturing group III nitride crystal by reacting an oxidizing gas containing nitrogen with a group III element droplet and growing a group III nitride crystal on a seed substrate (2023-10-24),
4. 11713517 - Group-III nitride substrate (2023-08-01),
5. 11713516 - Group III nitride crystal, group III nitride substrate, and method of manufacturing group III nitride crystal (2023-08-01),
6. 11624128 - Group III nitride crystal, group III nitride substrate, and method of manufacturing group III nitride crystal (2023-04-11),
7. 11396716 - Group-III nitride substrate containing carbon at a surface region thereof (2022-07-26),
8. 11377757 - Method for producing group III nitride crystal and seed substrate (2022-07-05),
9. 11370076 - RAMO4 substrate and manufacturing method thereof (2022-06-28),
10. 11248310 - Group III nitride substrate and method for producing group III nitride crystal (2022-02-15),
11. 11220759 - Method of manufacturing a group III-nitride crystal comprising a nucleation step, a pyramid growth step, a lateral growth step, and a flat thick film growth step (2022-01-11),
12. 11056389 - Method of manufacture of group III nitride semiconductor (2021-07-06),
13. 10927476 - Production method for group III nitride crystal (2021-02-23),
14. 10350725 - RAMO4 substrate and manufacturing method thereof (2019-07-16),
15. 10304740 - RAMO4 monocrystalline substrate (2019-05-28),

Title: Yoshio Okayama - Innovative Inventor from Gifu, Japan

Introduction: Yoshio Okayama is a renowned inventor hailing from Gifu, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Yoshio Okayama holds several patents in various technological domains, showcasing his continuous dedication to pushing the boundaries of innovation.

Career Highlights: Throughout his illustrious career, Yoshio Okayama has been instrumental in developing cutting-edge technologies that have revolutionized industries and improved the lives of many.

Collaborations: Yoshio Okayama has collaborated with leading research institutions, universities, and companies worldwide, fostering a culture of innovation and knowledge sharing.

Conclusion: Yoshio Okayama's passion for innovation and his relentless pursuit of excellence make him a true pioneer in the world of inventions, leaving a lasting impact on the technological landscape.

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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