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For the Inventor, By the Inventor

Tokyo, Japan

Nippon Valqua Industries, Ltd.

USPTO Granted Patents = 58

% Expired Patents = 27.6


Trademarks = 12

Forward Citations = 710

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81 inventors (with patents filed for the assignee):

goldMedal Akira Muramatsu (8 out of 8 patents)

silverMedal Yasushi Aburatani (8 out of 8 patents)

bronzeMedal Toshikiyo Komazawa (7 out of 7 patents)

4.  Tatsuo Takamure (7 out of 7 patents)

5.  Ippei Nakagawa (5 out of 22 patents)

6.  Tsutomu Yoshida (5 out of 21 patents)

7.  Kazuaki Tsuji (5 out of 5 patents)

8.  Yasuyuki Shirai (4 out of 38 patents)

9.  Tadahiro Ohmi (4 out of 201 patents)

10.  Hirohisa Imada (3 out of 4 patents)

11.  Masayuki Noguchi (3 out of 14 patents)

12.  Nobuhiro Yoshida (2 out of 26 patents)

13.  Masamichi Iwaki (2 out of 4 patents)

14.  Tomoaki Yokota (2 out of 2 patents)

15.  Shinya Kurokawa (2 out of 2 patents)


Core Competencies:
Composite Seal
Fluorine Rubber Composition
Thermally Conductive Resin
Hydrophilic Sheet
Metal Gasket
Porous PTFE Layer
Sealing Material
Gate Valve
Functional Molded Article
Activated Carbon Sheet
Electrical Connector
Clutch Facing

58 patents:

1. D822181 - Composite seal (2018-07-03),
2. D821552 - Composite seal (2018-06-26),
3. D819187 - Seal (2018-05-29),
4. D818089 - Composite seal (2018-05-15),
5. 9908980 - Fluorine rubber composition, crosslinked rubber molded body and method for producing same (2018-03-06),
6. 9892945 - Composite seal (2018-02-13),
7. 9890498 - Hydrophilic sheet and process for producing the same (2018-02-13),
8. 9859064 - Method for producing activated carbon sheet and method for improving impregnation of activated carbon sheet with electrolyte solution (2018-01-02),
9. 9688896 - Thermally conductive resin composition and thermally conductive sheet including the same (2017-06-27),
10. 9611940 - Gate valve (2017-04-04),
11. 9587744 - Sealing material (2017-03-07),
12. 9447881 - Seal material (2016-09-20),
13. 9441107 - Shaped product suppressed in bleeding and production process therefor (2016-09-13),
14. 9321212 - Filled fluororesin sheet, process for producing the same, and gasket (2016-04-26),
15. D754308 - Composite sealing material (2016-04-19),
Company Overview
Nippon Valqua Industries, Ltd., headquartered in Tokyo, specializes in sealing technologies that cater to various industrial applications. The company focuses on developing advanced materials such as composite seals, fluorine rubber compositions, and thermally conductive resins. Their expertise extends to creating hydrophilic sheets, metal gaskets, and porous PTFE layers, which are essential for effective sealing solutions. Valqua's commitment to innovation positions it as a key player in the sealing materials sector, addressing the needs of diverse markets.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Nippon Valqua Industries, Ltd. USPTO Patent Assignee Logo
58 Patents

#744 in Tokyo

#1,573 in Japan

#12,407 in the World

Tokyo, JP
Tokyo, Japan

Nippon Valqua Industries, Ltd.

Forward Citations = 710

81 inventors:

goldMedal Akira Muramatsu (8 out of 8 patents)

silverMedal Yasushi Aburatani (8 out of 8 patents)

bronzeMedal Toshikiyo Komazawa (7 out of 7 patents)

4.  Tatsuo Takamure (7 out of 7 patents)

5.  Ippei Nakagawa (5 out of 22 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nippon Valqua Industries, Ltd.. Retrieved from https://idiyas.com/company/nippon-valqua-industries

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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