Yoshitaka Yamakawa

This inventor holds 16 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 5 EPO patents. Top assignees: Jsr Corporation, Honda Motor Co., Ltd.. Active years: 2003-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshitaka Yamakawa. Retrieved from https://idiyas.com/inventor/yoshitaka-yamakawa

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

USPTO Granted Patents = 16 (Patent Applications = 1)

% Patents Active = 43.8

CIPO Patents = 1

EPO Patents = 5 (Patent Applications = 1)

Average Co-Inventor Count = 3.7

ph-index = 5

Forward Citations = 109(Granted Patents)

Location History:

Tsukuba, JP (2004)
Ibaraki, JP (2003 - 2011)
Tokyo, JP (2006 - 2013)
Chuo-ku, JP (2011 - 2013)
Minato-ku, JP (2014)

Company Filing History:

Honda Motor Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 2003-2014

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8729219 - Polyarylene block copolymer having sulfonic acid group and use thereof (2014-05-20),

2. 8431676 - Aromatic compound and sulfonated polyarylene polymer (2013-04-30),

3. 8399148 - Varnish for a solid polymer fuel cell (2013-03-19),

4. 8349994 - Electrode electrolyte for polymer-type fuel cell, and use thereof (2013-01-08),

5. 8309678 - Aromatic compound and polyarylene copolymer having nitrogen-containing heterocycle including sulfonic acid group in side chain (2012-11-13),

6. 8043762 - Polyphenylene-containing electrode paste (2011-10-25),

7. 7906608 - Nitrogenated aromatic compound, process for production of the same, polymer, and proton conductive membrane (2011-03-15),

8. 7893303 - Polyarylene, process for producing the same, solid polyelectrolyte, and proton-conductive film (2011-02-22),

9. 7651802 - Solid polymer electrolyte, proton conductive membrane, electrode electrolyte, electrode paste and membrane-electrode assembly (2010-01-26),

10. 7163988 - Aromatic sulfonic acid ester derivative, polyarylene, polyarylene having sulfonic acid group and process for producing the same, and polymer solid electrolyte and proton-conductive membrane (2007-01-16),

11. 7115699 - Sulfonated polymer having nitrile-containing hydrophobic block and solid polymer electrolyte (2006-10-03),

12. 6833426 - Halogenated aromatic compound, (co)polymer thereof, and proton-conductive membrane comprising same (2004-12-21),

13. 6825310 - Halogenated aromatic compound, polymer thereof, and proton-conductive membrane comprising same (2004-11-30),

14. 6812290 - Polyarylene copolymers and proton-conductive membrane (2004-11-02),

15. 6794480 - Monomer containing electron-withdrawing group and electron-donative group, and copolymer and proton-conductive membrane comprising same (2004-09-21),

Title: The Innovative Contributions of Yoshitaka Yamakawa

Introduction

Yoshitaka Yamakawa is a notable inventor hailing from Chuo-ku, Japan, recognized for his significant contributions to the field of polymer science. With a remarkable portfolio consisting of 16 patents, Yamakawa has made strides in developing advanced materials with enhanced functionality. His innovations are particularly focused on creating high-performance polymer electrolytes and membranes, which have applications in energy technologies.

Latest Patents

Two of Yamakawa's latest patents showcase his inventive spirit and technical expertise. The first patent involves a polyarylene block copolymer possessing a sulfonic acid group. This groundbreaking material is capable of serving as a solid polymer electrolyte and a proton conductive membrane characterized by high proton conductivity, excellent dimensional stability, and outstanding mechanical strength. Moreover, this polyarylene block copolymer exhibits reduced swelling in hot water and minimized shrinkage during drying.

The second patent details an aromatic compound and sulfonated polyarylene polymer. It describes a polyarylene copolymer made up of a specific structural unit, which contributes to the development of a solid polymer electrolyte and a proton conductive membrane. Notably, this invention is particularly relevant for direct methanol fuel cells, aligning with the growing demand for innovative energy solutions.

Career Highlights

Yoshitaka Yamakawa has had a successful career working with prominent companies such as JSR Corporation and Honda Motor Co., Ltd. His experience in leading enterprises in the polymer and automotive industries has undoubtedly enriched his perspective and expertise, facilitating the creation of impactful inventions that contribute to technology and sustainability.

Collaborations

Throughout his career, Yamakawa has collaborated with talented professionals, including Kohei Goto and Makoto Higami. These partnerships demonstrate his ability to work effectively within teams to drive innovative projects forward. The collaborative spirit often enhances creativity and leads to groundbreaking developments in the field of polymer technology.

Conclusion

In summary, Yoshitaka Yamakawa is a distinguished inventor making substantial contributions to the world of polymers and energy applications. His latest patents reflect an unparalleled commitment to innovation and his desire to address pressing challenges in the industry. With a solid foundation built from collaborations and experience at leading companies, Yamakawa continues to push the boundaries of what is possible in polymer science.

Profile summary based on public USPTO records.