Toshihiko Nishiyama

This inventor holds 53 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 3 EPO patents, primarily in Electrochemical Capacitors (CPC class 3615). Top assignees: Nec Corporation, Nec Tokin Corporation, Ihara Chemical Industry Co., Ltd.. Active years: 1994-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshihiko Nishiyama. Retrieved from https://idiyas.com/inventor/toshihiko-nishiyama

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

USPTO Granted Patents = 53 (Patent Applications = 1)

% Patents Active = 67.9

CIPO Patents = 1

EPO Patents = 3 (Patent Applications = 2)

Average Co-Inventor Count = 5.2

ph-index = 14

Forward Citations = 938(Granted Patents)

Forward Citations (Not Self Cited) = 913(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Toyama, JP (1998 - 2000)
Minato-ku, JP (2005)
Tokyo, JP (1994 - 2006)
Miyagi, JP (2005 - 2012)
Sendai, JP (2003 - 2014)

Company Filing History:

Nec Tokin Corporation

patents

1 out of 211

Ihara Chemical Industry Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1994-2014

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Areas of Expertise:

Electrochemical Cell

Solid Electrolytic Capacitor

Secondary Battery

Conductive Polymer

Battery Electrode

Electrolytic Solution

Proton Conductive Polymer

Indole Compounds

Molded Electrode

Capacitor Element

Polymer Secondary Cell

Multi Layer Electrolyte

53 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8625254 - Solid electrolytic capacitor with small leakage current and method of manufacturing the same (2014-01-07),

2. 8289677 - Conductive polymer suspension and method for producing the same, conductive polymer material, electrolytic capacitor, and solid electrolytic capacitor and method for producing the same (2012-10-16),

3. 8279582 - Conductive polymer suspension and method for producing the same, conductive polymer material, electrolytic capacitor, and solid electrolytic capacitor and method for producing the same (2012-10-02),

4. 8164884 - Solid electrolytic capacitor with improved moisture resistance properties and method of manufacturing the same (2012-04-24),

5. 8038738 - Solid electrolytic capacitor with small leakage current and method of manufacturing the same (2011-10-18),

6. 7309544 - Cell electrode and electrochemical cell therewith (2007-12-18),

7. 7255779 - Indolecarboxylic ester trimer and electrochemical cell using the same (2007-08-14),

8. 7230069 - Polymers and electrochemical cell therewith (2007-06-12),

9. 7205071 - Secondary battery and capacitor utilizing indole compounds (2007-04-17),

10. 7082027 - Proton-conducting electric double layer capacitor using electrolytic solution (2006-07-25),

11. 7057880 - Secondary battery and capacitor utilizing indole compounds (2006-06-06),

12. 7035084 - Secondary battery and capacitor using indole polymeric compound (2006-04-25),

13. 6998190 - Battery having a sheet current collector fluid-tightly separating basic cells (2006-02-14),

14. 6899974 - Secondary battery of proton conductive polymer (2005-05-31),

15. 6875541 - Electrochemical cell using indole-related compounds (2005-04-05),

Title: Toshihiko Nishiyama: Innovator in Solid Electrolytic Capacitors

Introduction

Toshihiko Nishiyama, a prolific inventor based in Miyagi, Japan, has made significant contributions to the field of electronics through his innovative work in solid electrolytic capacitors. With a remarkable portfolio of 53 patents, Nishiyama's inventions showcase his dedication to advancing technology and improving electronic components.

Latest Patents

Among his latest patents, Nishiyama has developed a solid electrolytic capacitor characterized by a low leakage current and an efficient manufacturing method. This patent describes a capacitor that includes an anode formed from a valve metal with a roughened surface layer, paired with a dielectric layer of valve metal oxide. The innovative design integrates a conductive polymer layer as the cathode, along with an anode lead and specific resist structures that enhance performance.

Another notable patent focuses on a conductive polymer suspension aimed at producing conductive polymer materials with high conductivity. This invention details a method of chemical oxidative polymerization of monomers using an oxidant and an aqueous solvent, resulting in a solid electrolytic capacitor with low equivalent series resistance (ESR).

Career Highlights

Throughout his career, Toshihiko Nishiyama has worked with esteemed companies, including NEC Corporation and NEC Tokin Corporation. His work in these institutions has played a crucial role in developing cutting-edge electronic components that continue to be integral to numerous applications in modern technology.

Collaborations

Nishiyama has collaborated with notable colleagues in the field, including Gaku Harada and Masato Kurosaki. Their teamwork has driven innovation forward, fostering an environment of creativity and technological advancements within their respective projects.

Conclusion

Toshihiko Nishiyama stands out as a significant figure in the realm of solid electrolytic capacitors, with a clear commitment to enhancing the performance and reliability of electronic components. His extensive knowledge and innovative spirit contribute to the ongoing evolution of technology in the industry.

Profile summary based on public USPTO records.