For the Inventor, By the Inventor

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Shizuoka, Japan

Usui Co., Ltd.

USPTO Granted Patents = 28

% Expired Patents = 10.7

EPO Patents = 22

Trademarks = 1

Forward Citations = 14

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34 inventors (with patents filed for the assignee):

Shuji Suzuki (6 out of 7 patents)

Tetsunobu Suzuki (5 out of 6 patents)

Hidetaka Ito (5 out of 10 patents)

4. Tatsuya Masuda (4 out of 9 patents)

5. Taizo Makino (4 out of 12 patents)

6. Masahiro Yamazaki (3 out of 66 patents)

7. Hiroyuki Nishizawa (3 out of 8 patents)

8. Koichi Hayashi (3 out of 13 patents)

9. Osamu Endo (2 out of 15 patents)

10. Tsugumi Yamazaki (2 out of 2 patents)

11. Hiroaki Kondo (2 out of 2 patents)

12. Katsunori Nagao (2 out of 4 patents)

13. Yuji Arai (2 out of 203 patents)

14. Yoshiyuki Serizawa (2 out of 13 patents)

15. Kazuma Hinobayashi (2 out of 2 patents)

28 patents: Sort by Forward Citations

1. 12460275 - Steel pipe for fuel injection pipe, and fuel injection pipe using same (2025-11-04),

2. 12305597 - Steel pipe for fuel injection pipe, and fuel injection pipe using same (2025-05-20),

3. 12000364 - Steel pipe for fuel injection pipe and fuel injection pipe using the same (2024-06-04),

4. D1016250 - Branch pipe (2024-02-27),

5. 11754027 - Gasoline direct injection rail (2023-09-12),

6. D987687 - Fuel rail (2023-05-30),

7. D987686 - Injector holder of fuel rail for gasoline direct-injection engine (2023-05-30),

8. 11585304 - Rail for high-pressure direct injection (2023-02-21),

9. 11421630 - Gas-liquid separator (2022-08-23),

10. 11313330 - Gas-liquid separator (2022-04-26),

11. 11203793 - Steel pipe for fuel injection pipe and method for producing the same (2021-12-21),

12. 11179662 - Gas-liquid separator (2021-11-23),

13. 11156194 - End cap (2021-10-26),

14. 11015231 - Method of manufacturing fuel rail for gasoline direct injection (2021-05-25),

15. 10961960 - Rail for high-pressure direct injection (2021-03-30),

USUI CO., LTD. is a leading global manufacturer and supplier of automotive and industrial products. With over 70 years of experience, USUI has earned a reputation for delivering exceptional quality and innovative solutions. From automotive parts such as oil coolers, heat exchangers, and EGR coolers to industrial products like tubes, fittings, and valves, USUI offers a comprehensive range of reliable and durable components. Committed to meeting customer needs, USUI focuses on continuous improvement, technological advancements, and environmental sustainability. Visit their website for more information and explore their wide range of high-quality products.

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USPTO Data Jan 1 1976 - Sep 29 2026

28 Patents

#35 in Shizuoka

#2,411 in Japan

#23,244 in the World

Shizuoka, Japan

Usui Co., Ltd.

Forward Citations = 14

34 inventors:

Shuji Suzuki (6 out of 7 patents)

Tetsunobu Suzuki (5 out of 6 patents)

Hidetaka Ito (5 out of 10 patents)

4. Tatsuya Masuda (4 out of 9 patents)

5. Taizo Makino (4 out of 12 patents)

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