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For the Inventor, By the Inventor

Sodegaura, Japan

Keiji Okinaka

This inventor holds 11 USPTO granted patents and 1 EPO patent. Top assignee: Idemitsu Kosan Company, Limited. Active years: 2020-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Okinaka. Retrieved from https://idiyas.com/inventor/keiji-okinaka-o6we2d55

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 100.0


Average Co-Inventor Count = 5.0

ph-index = 1

Forward Citations = 5(Granted Patents)


Company Filing History:

goldMedal11 out of 2,283 
 
Idemitsu Kosan Company, Limited
 patents

Years Active: 2020-2025

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11 patents (USPTO):Explore Patents
1. 12486452 - Organic electroluminescent element and electronic device (2025-12-02),
2. 12364160 - Organic electroluminescent element and electronic device (2025-07-15),
3. 12200961 - Organic electroluminescence element, display device, and electronic apparatus (2025-01-14),
4. 12077500 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2024-09-03),
5. 11944009 - Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device (2024-03-26),
6. 11739061 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2023-08-29),
7. 11730052 - Light-emitting device (2023-08-15),
8. 11482681 - Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device (2022-10-25),
9. 11059781 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2021-07-13),
10. 10851055 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2020-12-01),
11. 10590080 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2020-03-17),

Title: Keiji Okinaka - Innovative Japanese Inventor

Introduction: Keiji Okinaka is a renowned inventor hailing from Sodegaura, Japan, known for his groundbreaking contributions to various technological fields.

Latest Patents: Keiji Okinaka holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his versatility and forward-thinking approach to innovation.

Career Highlights: Throughout his illustrious career, Keiji Okinaka has worked with leading research institutions and tech companies, spearheading projects that have revolutionized industries and improved the quality of life for many.

Collaborations: Keiji Okinaka has collaborated with top engineers, scientists, and designers from around the world, fostering a culture of creativity and excellence in all his endeavors.

Conclusion: Keiji Okinaka's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors and shape the future of technology.

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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