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For the Inventor, By the Inventor

Tokyo, Japan

Tatsuji Numata

This inventor holds 19 USPTO granted patents and 1 published patent application and 7 EPO patents, primarily in Lithium-Ion Battery Technology. Top assignees: Nec Corporation, Nec Energy Devices, Ltd.. Active years: 2002-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsuji Numata. Retrieved from https://idiyas.com/inventor/tatsuji-numata

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

Calculating rank
USPTO Granted Patents = 19 

% Patents Active = 94.7

 

Average Co-Inventor Count = 3.6

ph-index = 4

Forward Citations = 88(Granted Patents)


Location History:

  • Sendai, JP (2013)
  • Minato-ku, JP (2015)
  • Kanagawa, JP (2016)
  • Tokyo, JP (2002 - 2019)

Company Filing History:

goldMedal17 out of 36,735 
 
Nec Corporation
 patents
silverMedal5 out of 92 
 
Nec Energy Devices, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 2002-2019

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Areas of Expertise:
Lithium Ion Battery
Secondary Battery
Negative Electrode
Positive Electrode
Nonaqueous Electrolyte
Active Material
Battery Manufacturing
Voltage Detection
Doping Method
Electrolytic Solution
Battery Control System
Cathode Active Material
19 patents (USPTO):Explore Patents
1. 10374219 - Lithium ion secondary battery (2019-08-06),
2. 9768476 - System and method for detecting a state of a lithium secondary battery by measuring a voltage of a negative electrode with respect to a reference electrode (2017-09-19),
3. 9325010 - Negative electrode active material for lithium secondary cell, lithium secondary cell employing the same, and method for producing the same (2016-04-26),
4. 9312534 - Nonaqueous electrolytic solution secondary battery, and positive electrode and negative electrode used in the same (2016-04-12),
5. 9263741 - Negative electrode for nanaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery using the same, and method for manufacturing negative electrode for nonaqueous electrolyte secondary battery (2016-02-16),
6. 9123928 - Method for doping and dedoping lithium into and from negative electrode and method for producing negative electrode for lithium secondary battery (2015-09-01),
7. 9076995 - Secondary battery (2015-07-07),
8. 9018916 - Lithium secondary battery and control system therefor, and method for detecting state of lithium secondary battery (2015-04-28),
9. 8956762 - Lithium ion secondary battery and method for manufacturing the same (2015-02-17),
10. 8435672 - Lithium ion secondary battery (2013-05-07),
11. 8227116 - Secondary battery (2012-07-24),
12. 7556889 - Positive electrode active material for secondary battery, positive electrode for secondary battery, secondary battery and method for producing positive electrode active material for secondary battery (2009-07-07),
13. 7335444 - Positive electrode active material for a secondary battery, secondary battery and process of manufacturing positive electrode active material for a secondary battery (2008-02-26),
14. 7179566 - Positive electrode active material for secondary cell, positive electrode for secondary cell using same, and secondary cell (2007-02-20),
15. 7026070 - Positive electrode active material, positive electrode and non-aqueous electrolyte secondary battery using thereof (2006-04-11),

Title: Tatsuji Numata: A Pioneer in Lithium-Ion Battery Technology

Introduction

Tatsuji Numata, based in Tokyo, Japan, is a notable inventor with a remarkable portfolio comprising 19 patents. His innovations, particularly in the field of lithium-ion battery technology, have had significant impacts on the energy storage sector. Through his work, he has contributed to enhancing battery performance, which is crucial for various applications, including consumer electronics and electric vehicles.

Latest Patents

One of Numata's latest patents focuses on a "Lithium Ion Secondary Battery." The invention outlines a battery assembly where a positive electrode and a negative electrode are strategically stacked through a separator. This innovative design aims to enhance charge and discharge cycle properties. The negative electrode includes a collector made from metal and an active material layer that ensures optimal performance. Notably, he has also patented a "System and Method for Detecting a State of a Lithium Secondary Battery." This technology involves measuring the voltage of a negative electrode that utilizes silicon oxide as an active material. By generating a V−dQ/dV curve, this system can accurately assess the state of the battery, thus improving reliability and efficiency.

Career Highlights

Throughout his career, Tatsuji Numata has worked with prominent companies such as NEC Corporation and NEC Energy Devices, Ltd. His roles in these organizations have allowed him to bring forth innovative ideas and solutions that push the boundaries of lithium-ion technology. His extensive experience has played a vital role in his success as an inventor.

Collaborations

Numata has collaborated with talented professionals in his field, notably Daisuke Kawasaki and Jiro Iriyama. These partnerships have fostered a synergistic exchange of ideas and expertise, further enriching Numata's contributions to battery technology and innovation.

Conclusion

Tatsuji Numata's forward-thinking approach and dedication to improving lithium-ion technology have positioned him as a key figure in the industry. With numerous patents reflecting his innovative spirit, he continues to shape the future of energy storage solutions. His passion for invention and collaboration with others highlights the importance of teamwork in driving technological advancements.

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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