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For the Inventor, By the Inventor

Ibaraki, Japan

Nippon Denkai, Ltd.


USPTO Granted Patents = 12

% Expired Patents = 33.3


Forward Citations = 75

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22 inventors (with patents filed for the assignee):

goldMedal Yasuhiro Endo (6 out of 6 patents)

silverMedal Masami Noguchi (3 out of 3 patents)

bronzeMedal Kazuyoshi Aso (3 out of 3 patents)

4.  Takeshi Yamagishi (2 out of 3 patents)

5.  Katsumi Kobayashi (2 out of 2 patents)

6.  Toshio Kawasaki (2 out of 2 patents)

7.  Yuushi Sato (1 out of 1 patent)

8.  Shigetada Motohashi (1 out of 1 patent)

9.  Masashi Amakata (1 out of 1 patent)

10.  Nobuchika Yagihashi (1 out of 1 patent)

11.  Hiroki Hara (1 out of 1 patent)

12.  Kojiro Noda (1 out of 1 patent)

13.  Ayumi Endo (1 out of 1 patent)

14.  Tatsunori Matsumoto (1 out of 1 patent)

15.  Masahiro Mikamo (1 out of 2 patents)


12 patents:

1. 12415340 - Surface-treated copper foil (2025-09-16),
2. 12091766 - Electrolytic copper foil and method for producing same (2024-09-17),
3. 11952675 - Surface-treated copper foil and method for manufacturing same (2024-04-09),
4. 7816015 - Composite copper foil and method for production thereof (2010-10-19),
5. 6663758 - Method and apparatus for producing electrolytic copper foil (2003-12-16),
6. 6497806 - Method of producing a roughening-treated copper foil (2002-12-24),
7. 6495022 - Method of producing copper foil for fine wiring (2002-12-17),
8. 6461745 - Copper foil for tape carrier and tab carrier tape and tab tape carrier using the copper foil (2002-10-08),
9. 6117566 - Lead frame material (2000-09-12),
10. 5712047 - Copper foil for printed wiring board (1998-01-27),
11. 5569545 - Copper clad laminate, multilayer printed circuit board and their (1996-10-29),
12. 5534128 - Non-cyanide copper-zinc electroplating bath, method of surface treatment (1996-07-09),
Company Overview
Nippon Denkai, Ltd. is a prominent Japanese company specializing in the development and manufacturing of advanced electronic materials and components. The organization focuses on innovative solutions for various industries, including electronics and telecommunications, with a strong emphasis on enhancing performance and reliability. With a commitment to research and development, Nippon Denkai aims to contribute to technological advancements in both domestic and international markets, positioning itself as a key player in the electronic materials sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

12 Patents

#26 in Ibaraki

#3,934 in Japan

#48,129 in the World

Ibaraki, JP
Ibaraki, Japan

Nippon Denkai, Ltd.

Forward Citations = 75

22 inventors:

goldMedal Yasuhiro Endo (6 out of 6 patents)

silverMedal Masami Noguchi (3 out of 3 patents)

bronzeMedal Kazuyoshi Aso (3 out of 3 patents)

4.  Takeshi Yamagishi (2 out of 3 patents)

5.  Katsumi Kobayashi (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nippon Denkai, Ltd.. Retrieved from https://idiyas.com/company/nippon-denkai

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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