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For the Inventor, By the Inventor

Kanagawa, Japan

Nec Energy Devices, Ltd.


USPTO Granted Patents = 92

% Expired Patents = 1.1


Forward Citations = 251

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81 inventors (with patents filed for the assignee):

goldMedal Shin Suzuki (12 out of 13 patents)

silverMedal Shinako Kaneko (11 out of 25 patents)

bronzeMedal Hitoshi Ishikawa (9 out of 75 patents)

4.  Yasutaka Kono (7 out of 9 patents)

5.  Tadahiro Yoshida (7 out of 8 patents)

6.  Toru Suzuki (6 out of 72 patents)

7.  Jiro Iriyama (6 out of 34 patents)

8.  Tomokazu Kumeuchi (6 out of 6 patents)

9.  Daisuke Kawasaki (5 out of 43 patents)

10.  Ryuichi Kasahara (5 out of 17 patents)

11.  Tatsuji Numata (5 out of 19 patents)

12.  Yoko Hashizume (5 out of 5 patents)

13.  Koichi Zama (5 out of 5 patents)

14.  Takao Daidoji (4 out of 5 patents)

15.  Tetsuya Kajita (4 out of 16 patents)


Core Competencies:
Lithium Ion Battery
Secondary Battery
Battery Pack
Battery Control System
Nonaqueous Electrolyte
Charging Apparatus
Electrode Manufacturing
Power Storage System
Gel Electrolyte
Negative Electrode
Battery Module
Discharge Controller

92 patents:

1. 10340550 - Lithium ion secondary cell (2019-07-02),
2. 10305108 - Graphite-based active material, negative electrode, and lithium ion secondary battery (2019-05-28),
3. 10305088 - Secondary battery and method for manufacturing same (2019-05-28),
4. 10290854 - Method of manufacturing paste for manufacturing of negative electrode, method of manufacturing negative electrode for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery (2019-05-14),
5. 10290839 - Secondary battery (2019-05-14),
6. 10270121 - Secondary battery (2019-04-23),
7. 10236497 - Intermittently coated battery electrode manufacturing method (2019-03-19),
8. 10236487 - Battery module (2019-03-19),
9. 10230250 - Charging apparatus, electricity storage system, charging method and program (2019-03-12),
10. 10218036 - Battery pack, electrical device, and control method therefor (2019-02-26),
11. 10218029 - Electrode for secondary battery, secondary battery, and manufacturing method of the electrode and the secondary battery (2019-02-26),
12. 10217988 - Secondary battery (2019-02-26),
13. 10193184 - Lithium ion secondary battery and method for manufacturing same (2019-01-29),
14. 10164233 - Lithium ion secondary battery comprising a heat sealed separator (2018-12-25),
15. 10153477 - Lithium-ion secondary battery and method of producing the same (2018-12-11),
Company Overview
Nec Energy Devices, Ltd., based in Kanagawa, Japan, specializes in the development and manufacturing of advanced lithium-ion battery technologies. The company focuses on various aspects of battery systems, including secondary batteries, battery packs, and control systems, aiming to enhance energy storage solutions. Their expertise extends to nonaqueous electrolytes and electrode manufacturing, positioning them as a key player in the power storage sector, catering to diverse applications in energy management and electric mobility.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

92 Patents

#41 in Kanagawa

#1,186 in Japan

#8,380 in the World

Kanagawa, JP
Kanagawa, Japan

Nec Energy Devices, Ltd.

Forward Citations = 251

81 inventors:

goldMedal Shin Suzuki (12 out of 13 patents)

silverMedal Shinako Kaneko (11 out of 25 patents)

bronzeMedal Hitoshi Ishikawa (9 out of 75 patents)

4.  Yasutaka Kono (7 out of 9 patents)

5.  Tadahiro Yoshida (7 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nec Energy Devices, Ltd.. Retrieved from https://idiyas.com/company/nec-energy-devices

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

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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