For the Inventor, By the Inventor

Enter assignee name

Valqua, Ltd.

USPTO Granted Patents = 79

% Expired Patents = 1.3

EPO Patents = 7

Trademarks = 18

Forward Citations = 541

Loading Chart...

Loading Chart...

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. Sangho Kim (9 out of 9 patents)

5. Akira Ueda (9 out of 11 patents)

6. Naoki Osumi (8 out of 9 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. Akihiro Nagano (4 out of 4 patents)

12. Takahiro Yamamoto (4 out of 5 patents)

13. Tomomitsu Mochizuki (3 out of 3 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

79 patents: Sort by Forward Citations

1. 12716501 - Dust seal ring (2026-08-25),

2. 12716500 - Annular seal material and manufacturing method (2026-08-25),

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

4. 12687442 - Method for confirming internal stress of resin and apparatus for measuring same (2026-07-21),

5. 12674054 - Elastomer composition, sealing material, and method for producing sealing material (2026-07-07),

6. 12655282 - Elastomer composition, sealing material, and method for producing sealing material (2026-06-16),

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

8. 12643999 - Elastomer composition, sealing material, and method for producing sealing material (2026-06-02),

9. 12590863 - Vibration analysis system and vibration analysis method (2026-03-31),

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

11. 12565601 - Bonded object, and method for manufacturing bonded object (2026-03-03),

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

13. 12385565 - Metal gasket (2025-08-12),

14. 12339188 - Information processing device (2025-06-24),

15. D1074944 - Seal (2025-05-13),

VALQUA, LTD. is a global leader in manufacturing and distributing sealing products and solutions. With over 75 years of experience, VALQUA is committed to providing high-quality and reliable sealing solutions for a wide range of industries including automotive, chemical, oil and gas, and food processing. We offer a comprehensive range of gaskets, packings, o-rings, and mechanical seals designed to meet the most demanding requirements of our customers. Our cutting-edge technology, advanced manufacturing processes, and exceptional customer service have made us a trusted partner for companies worldwide. Visit our website to learn more about our innovative sealing solutions and how we can support your business.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

79 Patents

#629 in Tokyo

#1,312 in Japan

#9,547 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. Sangho Kim (9 out of 9 patents)

5. Akira Ueda (9 out of 11 patents)

Please report any incorrect information to [email protected]

Loading…