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For the Inventor, By the Inventor

Kanagawa, Japan

Elna Co., Ltd.


USPTO Granted Patents = 19


Forward Citations = 354

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28 inventors (with patents filed for the assignee):

goldMedal Takeshi Morimoto (12 out of 76 patents)

silverMedal Kazuya Hiratsuka (6 out of 42 patents)

bronzeMedal Yasuhiro Sanada (4 out of 12 patents)

4.  Naoto Iwano (4 out of 4 patents)

5.  Yoshiki Hamatani (4 out of 7 patents)

6.  Eiji Endoh (3 out of 26 patents)

7.  Kaori Matsumura (3 out of 3 patents)

8.  Naozumi Kimura (3 out of 3 patents)

9.  Toshiya Matsubara (3 out of 18 patents)

10.  Hiroshi Yanaka (2 out of 2 patents)

11.  Hikaru Santsuka (2 out of 2 patents)

12.  Hidekazu Mizushima (2 out of 2 patents)

13.  Hiroshi Aruga (2 out of 54 patents)

14.  Hidemi Yamada (2 out of 8 patents)

15.  Michio Okamura (2 out of 31 patents)


19 patents:

1. 12512261 - Surface-mount capacitor (2025-12-30),
2. 9842703 - Aluminum electrolytic capacitor and rubber seal for same (2017-12-12),
3. 9496091 - Aluminum electrolytic capacitor and rubber seal for same (2016-11-15),
4. D418812 - Voltage stabilizer (2000-01-11),
5. 5942885 - Power compensating device for battery (1999-08-24),
6. 5795680 - Non-aqueous electrolyte type secondary battery (1998-08-18),
7. 5604426 - Electric apparatus with a power supply including an electric double (1997-02-18),
8. 5545933 - Electric power storage apparatus (1996-08-13),
9. 5194127 - Method for etching an aluminum foil for an electrolytic capacitor (1993-03-16),
10. 5143587 - Method for etching an aluminum foil for an electrolytic capacitor (1992-09-01),
11. 4862328 - Electric double layer capacitor (1989-08-29),
12. 4858078 - Solid electrolytic capacitor (1989-08-15),
13. 4831499 - Electrolytic capacitor (1989-05-16),
14. 4757424 - Electric double layer capacitor (1988-07-12),
15. 4747021 - Electrolytic capacitor (1988-05-24),
Company Overview
Elna Co., Ltd. is a prominent Japanese company based in Kanagawa, specializing in the development and manufacturing of electronic components, particularly capacitors. The organization is recognized for its innovative solutions in the fields of electronics, automotive, and industrial applications. Elna's commitment to research and development drives advancements in capacitor technology, enabling enhanced performance and reliability in various electronic devices. The company serves a global market, contributing to the evolution of electronic systems across multiple industries.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

19 Patents

#102 in Kanagawa

#3,039 in Japan

#32,663 in the World

Kanagawa, JP
Kanagawa, Japan

Elna Co., Ltd.

Forward Citations = 354

28 inventors:

goldMedal Takeshi Morimoto (12 out of 76 patents)

silverMedal Kazuya Hiratsuka (6 out of 42 patents)

bronzeMedal Yasuhiro Sanada (4 out of 12 patents)

4.  Naoto Iwano (4 out of 4 patents)

5.  Yoshiki Hamatani (4 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Elna Co., Ltd.. Retrieved from https://idiyas.com/company/elna-company

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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