logo

For the Inventor, By the Inventor

Ibaraki, Japan

Eiji Yoshikawa

This inventor holds 8 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Sumitomo Chemical Company, Limited, Cambridge Display Technology Limited. Active years: 2006-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Eiji Yoshikawa. Retrieved from https://idiyas.com/inventor/eiji-yoshikawa-kshqwjnx

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

Calculating rank
USPTO Granted Patents = 8 

% Patents Active = 25.0


Average Co-Inventor Count = 2.8

ph-index = 2

Forward Citations = 7(Granted Patents)


Location History:

  • Ibaraki, JP (2006 - 2010)
  • Tsukuba, JP (2018 - 2019)

Company Filing History:

goldMedal8 out of 6,965 
 
Sumitomo Chemical Company, Limited
 patents
silverMedal1 out of 335 
 
Cambridge Display Technology Limited
 patents
where one patent can have more than one assignee

Years Active: 2006-2025

Loading Chart...
Loading Chart...
8 patents (USPTO):Explore Patents
1. 12305104 - Azo compound, composition, film, laminate, and display device (2025-05-20),
2. 10239886 - Polymer compound and organic semiconductor device using the same (2019-03-26),
3. 10096785 - Tetracenothiophene derivatives with alkoxy-c-alkyne solubilising units and their applications as organic semiconductors (2018-10-09),
4. 7732643 - Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same (2010-06-08),
5. 7671226 - Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same (2010-03-02),
6. 7439379 - Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same (2008-10-21),
7. 7241927 - Transition metal complexes, ligands, catalysts for olefin polymerization, and process for production of olefin polymers (2007-07-10),
8. 7141690 - Transition metal complexes, ligands, polymerization catalysts for olefins, and process for production of olefin polymers (2006-11-28),

Title: Eiji Yoshikawa: Innovator in Azo Compounds and Organic Semiconductors

Introduction

Eiji Yoshikawa is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of organic semiconductors and azo compounds. With a total of 8 patents to his name, Yoshikawa's work has had a considerable impact on various technological advancements.

Latest Patents

Yoshikawa's latest patents include innovative developments in azo compounds, compositions, films, laminates, and display devices. One of his notable inventions involves an azo compound represented by a specific formula, which includes various components such as divalent linking groups and aliphatic hydrocarbon groups. This invention aims to enhance the performance and efficiency of display devices.

Career Highlights

Throughout his career, Eiji Yoshikawa has worked with reputable companies, including Sumitomo Chemical Company, Limited and Cambridge Display Technology Limited. His expertise in the field has allowed him to contribute to groundbreaking research and development projects.

Collaborations

Yoshikawa has collaborated with talented individuals such as Hidenori Hanaoka and Yuka Imamoto. These partnerships have fostered innovation and have led to the successful development of various technologies.

Conclusion

Eiji Yoshikawa's contributions to the fields of azo compounds and organic semiconductors highlight his role as a leading inventor. His patents and collaborations continue to influence advancements in 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]
Loading…