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For the Inventor, By the Inventor

Tsukuba, Japan

Taketsugu Yamamoto

This inventor holds 16 USPTO granted patents and 19 published patent applications. Top assignees: Sumitomo Chemical Company, Limited, The University of Tokyo. Active years: 1997-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Taketsugu Yamamoto. Retrieved from https://idiyas.com/inventor/taketsugu-yamamoto

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

USPTO Granted Patents = 16 

% Patents Active = 87.5

Average Co-Inventor Count = 3.3

ph-index = 5

Forward Citations = 142(Granted Patents)


Location History:

  • Ibaraki-ken, JP (1997)
  • Ibaraki, JP (1998 - 2000)
  • Tsukuba, JP (2002 - 2019)

Company Filing History:

goldMedal16 out of 6,964 
 
Sumitomo Chemical Company, Limited
 patents
silverMedal1 out of 1,358 
 
The University of Tokyo
 patents
where one patent can have more than one assignee

Years Active: 1997-2019

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16 patents (USPTO):Explore Patents
1. 10222321 - Laminate substrate measurement method, laminate substrate and measurement apparatus (2019-03-05),
2. 10122014 - Mixed metal oxide and sodium secondary battery (2018-11-06),
3. 9899665 - Sodium secondary battery comprising carbonaceous material (2018-02-20),
4. 9502714 - Mixed metal oxide, electrode, and sodium secondary battery (2016-11-22),
5. 9337519 - Air battery having an electrode and polymer film (2016-05-10),
6. 9142860 - Mixed metal oxide and sodium secondary battery (2015-09-22),
7. 8795894 - Positive electrode active material, sodium secondary battery, and production method of olivine-type phosphate (2014-08-05),
8. 8795889 - Transition metal phosphate, production process thereof, positive electrode, and sodium secondary battery (2014-08-05),
9. 8790831 - Powder for positive electrode active material, positive active electrode active material, and sodium secondary battery (2014-07-29),
10. 8716836 - Semiconductor wafer, semiconductor wafer manufacturing method, and electronic device (2014-05-06),
11. 6379846 - Non-aqueous electrolyte and lithium secondary battery using the same (2002-04-30),
12. 6087031 - Polymer electrolyte and process for producing the same (2000-07-11),
13. 5985477 - Polymer electrolyte for fuel cell (1999-11-16),
14. 5849434 - Non-aqueous electrolyte lithium secondary battery (1998-12-15),
15. 5795677 - Non-aqueous electrolyte and lithium secondary battery (1998-08-18),

Title: Taketsugu Yamamoto: Innovator in Measurement Methods and Battery Technology

Introduction

Taketsugu Yamamoto is a prominent inventor based in Tsukuba, Japan. He has made significant contributions to the fields of measurement methods and battery technology. With a total of 16 patents to his name, his work continues to influence various industries.

Latest Patents

Yamamoto's latest patents include a laminate substrate measurement method, which provides a novel approach to measuring laminate substrates. This method involves emitting incident light from the side of the measurement-target layer and measuring reflected light to acquire multiple reflected light-related values. Additionally, he has developed a sodium secondary battery that reduces lithium usage while maintaining a larger discharge capacity during repeated charge and discharge cycles. This innovation utilizes a mixed metal oxide as the positive electrode active material, enhancing the efficiency of secondary batteries.

Career Highlights

Throughout his career, Taketsugu Yamamoto has worked with notable organizations, including Sumitomo Chemical Company, Limited and The University of Tokyo. His experience in these institutions has allowed him to refine his expertise and contribute to groundbreaking innovations.

Collaborations

Yamamoto has collaborated with esteemed colleagues such as Masami Makidera and Atsushi Terahara. These partnerships have fostered a collaborative environment that has led to the development of impactful technologies.

Conclusion

Taketsugu Yamamoto's contributions to measurement methods and battery technology exemplify his innovative spirit and dedication to advancing these fields. His patents reflect a commitment to improving efficiency and sustainability 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]
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