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Valqua, Ltd.

USPTO Granted Patents = 80

% Expired Patents = 1.3

EPO Patents = 7

Trademarks = 18

Forward Citations = 541

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57 inventors (with patents filed for the assignee):

Nobuhiro Yoshida (21 out of 26 patents)

Ippei Nakagawa (15 out of 22 patents)

Kazuaki Tsuji (9 out of 27 patents)

4. Naoki Osumi (9 out of 10 patents)

5. Sangho Kim (9 out of 9 patents)

6. Akira Ueda (9 out of 11 patents)

7. Yong-Gu Kang (6 out of 6 patents)

8. Mitsuru Minami (5 out of 5 patents)

9. Tetsuya Komeda (5 out of 5 patents)

10. Takafumi Sakurai (5 out of 5 patents)

11. Tomomitsu Mochizuki (4 out of 4 patents)

12. Akihiro Nagano (4 out of 4 patents)

13. Takahiro Yamamoto (4 out of 5 patents)

14. Kana Hirai (3 out of 3 patents)

15. Michi Kuroda (3 out of 4 patents)

Core Competencies:

Composite Seal

Elastomer Composition

Metal Gasket

Sealing Ring

PTFE Sheet

Perfluoroelastomer

Seal Structure

Liquid Leakage Prediction

Vacuum Gate Valve

Sensor Manufacturing

Pressure Vessel

80 patents: Sort by Forward Citations

1. 12742500 - Annular seal material and manufacturing method (2026-09-22),

2. 12716501 - Dust seal ring (2026-08-25),

3. 12716500 - Annular seal material and manufacturing method (2026-08-25),

4. D1136884 - Composite sealing material (2026-07-28),

5. 12687442 - Method for confirming internal stress of resin and apparatus for measuring same (2026-07-21),

6. 12674054 - Elastomer composition, sealing material, and method for producing sealing material (2026-07-07),

7. 12655282 - Elastomer composition, sealing material, and method for producing sealing material (2026-06-16),

8. D1129048 - Tank rotating jig (2026-06-02),

9. 12643999 - Elastomer composition, sealing material, and method for producing sealing material (2026-06-02),

10. 12590863 - Vibration analysis system and vibration analysis method (2026-03-31),

11. D1120564 - Tank rotating jig (2026-03-24),

12. 12565601 - Bonded object, and method for manufacturing bonded object (2026-03-03),

13. D1107594 - Tank transport container rotating jig (2025-12-30),

14. 12385565 - Metal gasket (2025-08-12),

15. 12339188 - Information processing device (2025-06-24),

Company Overview

Valqua, Ltd., headquartered in Tokyo, Japan, specializes in sealing technology, focusing on the development and manufacturing of advanced sealing solutions. The company is recognized for its expertise in composite seals, elastomer compositions, metal gaskets, sealing rings, and PTFE sheets. Valqua's innovative approaches extend to perfluoroelastomers and seal structures, addressing critical applications in various industries. Their commitment to quality and performance ensures effective solutions for liquid leakage prediction and prevention.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

80 Patents

#627 in Tokyo

#1,304 in Japan

#9,454 in the World

Valqua, Ltd.

Forward Citations = 541

57 inventors:

Nobuhiro Yoshida (21 out of 26 patents)

Ippei Nakagawa (15 out of 22 patents)

Kazuaki Tsuji (9 out of 27 patents)

4. Naoki Osumi (9 out of 10 patents)

5. Sangho Kim (9 out of 9 patents)

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

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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