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For the Inventor, By the Inventor

Kyoto, Japan

Hitachi Maxell Energy, Ltd.


USPTO Granted Patents = 10

% Expired Patents = 40.0


Forward Citations = 38

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38 inventors (with patents filed for the assignee):

goldMedal Yoshihisa Hirose (2 out of 3 patents)

silverMedal Noriyuki Yabushita (1 out of 9 patents)

bronzeMedal Masayuki Yamada (1 out of 39 patents)

4.  Hiroshi Fukunaga (1 out of 27 patents)

5.  Haruyuki Nakanishi (1 out of 49 patents)

6.  Fusaji Kita (1 out of 26 patents)

7.  Shigeaki Murata (1 out of 26 patents)

8.  Koji Yamaguchi (1 out of 35 patents)

9.  Toshikazu Yoshiba (1 out of 5 patents)

10.  Kazunobu Matsumoto (1 out of 6 patents)

11.  Hideki Tsubata (1 out of 2 patents)

12.  Hiroyasu Inoue (1 out of 2 patents)

13.  Masahiro Imanishi (1 out of 31 patents)

14.  Ryoko Masuyoshi (1 out of 1 patent)

15.  Mitsutoshi Watanabe (1 out of 1 patent)


10 patents:

1. 8221509 - Battery and method for producing the same (2012-07-17),
2. 8216719 - Non-aqueous secondary battery and method for producing the same (2012-07-10),
3. 8197954 - Battery pack (2012-06-12),
4. 8153298 - Positive electrode for alkaline battery and alkaline battery using the same (2012-04-10),
5. 8137840 - Nonaqueous secondary battery and method of using the same (2012-03-20),
6. 8043740 - Flat-shaped battery (2011-10-25),
7. 8021793 - Hydrogen producing apparatus and fuel cell system using the same (2011-09-20),
8. 8007691 - Fine particle of perovskite oxide, particle having deposited perovskite oxide, catalyst material, catalyst material for oxygen reduction, catalyst material for fuel cell, and electrode for fuel cell (2011-08-30),
9. 8003247 - Button-type alkaline battery and method of manufacturing the same (2011-08-23),
10. 7989100 - Sealed prismatic battery (2011-08-02),
Company Overview
Hitachi Maxell Energy, Ltd., based in Kyoto, Japan, specializes in the development and manufacturing of advanced energy storage solutions, including batteries and capacitors. The company focuses on innovative technologies that enhance energy efficiency and sustainability across various applications, including consumer electronics, automotive, and industrial sectors. With a commitment to research and development, Hitachi Maxell Energy aims to contribute to a greener future through cutting-edge energy technologies and solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

10 Patents

#121 in Kyoto 615-0031

#4,404 in Japan

#56,092 in the World

Kyoto, JP
Kyoto, Japan

Hitachi Maxell Energy, Ltd.

Forward Citations = 38

38 inventors:

goldMedal Yoshihisa Hirose (2 out of 3 patents)

silverMedal Noriyuki Yabushita (1 out of 9 patents)

bronzeMedal Masayuki Yamada (1 out of 39 patents)

4.  Hiroshi Fukunaga (1 out of 27 patents)

5.  Haruyuki Nakanishi (1 out of 49 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Maxell Energy, Ltd.. Retrieved from https://idiyas.com/company/hitachi-maxell-energy

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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