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For the Inventor, By the Inventor

Shizuoka, Japan

Usui Co., Ltd.


USPTO Granted Patents = 28

% Expired Patents = 10.7


Trademarks = 1

Forward Citations = 14

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34 inventors (with patents filed for the assignee):

goldMedal Shuji Suzuki (6 out of 7 patents)

silverMedal Tetsunobu Suzuki (5 out of 6 patents)

bronzeMedal 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)


Core Competencies:
Fuel Injection Pipe
Gasoline Direct Injection
Gas-Liquid Separator
Fuel Rail
Swirling Flow Generator
High-Pressure Rail
Injector Holder
End Cap
Fluid Fan Clutch
Torque Sensor Shaft
Amorphous Film

28 patents:

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),
Company Overview
Usui Co., Ltd. is a prominent Japanese company based in Shizuoka, specializing in the development and manufacturing of precision components and systems for various industries. The company focuses on automotive parts, electronic devices, and industrial machinery, leveraging advanced technologies to enhance product performance and reliability. With a commitment to innovation, Usui engages in research and development to create solutions that meet the evolving needs of its global clientele, contributing to advancements in manufacturing and engineering sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Usui Co., Ltd. USPTO Patent Assignee Logo
28 Patents

#35 in Shizuoka

#2,417 in Japan

#23,299 in the World

Shizuoka, JP
Shizuoka, Japan

Usui Co., Ltd.

Forward Citations = 14

34 inventors:

goldMedal Shuji Suzuki (6 out of 7 patents)

silverMedal Tetsunobu Suzuki (5 out of 6 patents)

bronzeMedal Hidetaka Ito (5 out of 10 patents)

4.  Tatsuya Masuda (4 out of 9 patents)

5.  Taizo Makino (4 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Usui Co., Ltd.. Retrieved from https://idiyas.com/company/usui-company

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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