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For the Inventor, By the Inventor

Naka, Japan

Kazutoshi Higashiyama

This inventor holds 19 USPTO granted patents, plus 1 CIPO patent. Top assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha, International Superconductivity Technology Center. Active years: 1988-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazutoshi Higashiyama. Retrieved from https://idiyas.com/inventor/kazutoshi-higashiyama

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

USPTO Granted Patents = 19

% Patents Active = 57.9


Average Co-Inventor Count = 4.7

ph-index = 7

Forward Citations = 160(Granted Patents)


Location History:

  • Nagoya, JP (1993)
  • Aichi, JP (1994)
  • Katsuta, JP (1988 - 1996)
  • Naka-gun, JP (2001)
  • Hitachi, JP (1993 - 2005)
  • Naka-machi, JP (2004 - 2006)
  • Naka, JP (2003 - 2009)

Company Filing History:

goldMedal18 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal2 out of 222 
 
Babcock-Hitachi Kabushiki Kaisha
 patents
bronzeMedal2 out of 128 
 
International Superconductivity Technology Center
 patents
4. 2 out of 2,606 
 
Ngk Spark Plug Company, Limited
 patents
5. 1 out of 3,781 
 
Renesas Technology Corp.
 patents
6. 1 out of 177 
 
The Tokyo Electric Power Company, Incorporated
 patents
where one patent can have more than one assignee

Years Active: 1988-2009

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19 patents (USPTO):Explore Patents
1. 7560185 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2009-07-14),
2. 7553574 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2009-06-30),
3. 7541107 - Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cell (2009-06-02),
4. 7071053 - Method of forming capacitor with ruthenium top and bottom electrodes by MOCVD (2006-07-04),
5. 6964823 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2005-11-15),
6. 6917065 - Ferroelectric capacitor and semiconductor device (2005-07-12),
7. 6893764 - Solid polyelectrolyte, assembly of membrane and electrodes, and fuel cell (2005-05-17),
8. 6890673 - Hydrogen producing apparatus and power generating system using it (2005-05-10),
9. 6821845 - Semiconductor device and method for manufacturing the same (2004-11-23),
10. 6777248 - Dielectric element and manufacturing method therefor (2004-08-17),
11. 6670065 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2003-12-30),
12. 6548342 - Method of producing oxide dielectric element, and memory and semiconductor device using the element (2003-04-15),
13. 6316391 - Oxide superconducting wire and method of manufacturing the same (2001-11-13),
14. 5545610 - Oxide-based superconductor, a process for preparing the same and a wire (1996-08-13),
15. 5508256 - Oxide high-temperature superconducting material, method of preparing (1996-04-16),

Title: Kazutoshi Higashiyama: Innovator in Solid Polymer Electrolytes

Introduction

Kazutoshi Higashiyama, an accomplished inventor from Naka, Japan, has made significant contributions to the field of solid polymer electrolytes. With a remarkable portfolio of 19 patents, he has demonstrated expertise in innovative technologies that enhance fuel cell efficiency and performance.

Latest Patents

Among his recent innovations, Higashiyama's patents include advancements in solid polymer electrolytes, membranes utilizing them, and solutions for coating electrode catalysts. One of his notable inventions outlines a solid polymer electrolyte composed of a polymer compound with a hydrocarbon aromatic group in its backbone, featuring a side chain as per FORMULA 1, where 'n' can be 1 to 6. These solid polymer electrolytes have potential applications in membranes and can effectively be used in systems for covering electrode catalysts.

Career Highlights

Throughout his career, Kazutoshi Higashiyama has worked with prominent companies, including Hitachi, Ltd. and NGK Spark Plug Company, Limited. His extensive experience in these organizations has enriched his understanding of advanced materials and propelled his innovations in the field of fuel cells and electrolyte applications.

Collaborations

Higashiyama has collaborated with notable professionals in his field, including Tomoichi Kamo and Takaaki Suzuki. These partnerships have facilitated the exchange of ideas and helped spur innovative solutions within the realm of solid polymer technology.

Conclusion

Kazutoshi Higashiyama stands out as a leading inventor in the development of solid polymer electrolytes and related technologies. His contributions not only enhance fuel cell technology but also pave the way for future innovations in energy solutions. As the world continues to seek efficient and sustainable energy resources, Higashiyama's work remains crucial in driving progress in this vital sector.

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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