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For the Inventor, By the Inventor

Shiga, Japan

Suiken Co., Ltd.

Calculating rank
USPTO Granted Patents = 20


Forward Citations = 106

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10 inventors (with patents filed for the assignee):

goldMedal Toshiyuki Sato (12 out of 16 patents)

silverMedal Tamotsu Yamashita (8 out of 12 patents)

bronzeMedal Taihei Yokoyama (4 out of 4 patents)

4.  Yasunari Sato (3 out of 3 patents)

5.  Gumpei Yokoyama (2 out of 2 patents)

6.  Hideshige Homma (2 out of 3 patents)

7.  Gunpei Yokoyama (1 out of 1 patent)

8.  Toshihiko Shimizu (1 out of 1 patent)

9.  Soichi Ogawa (1 out of 4 patents)

10.  Jun Otsuka (1 out of 1 patent)

11.  Jaehyun Kim (319 patents)


20 patents:

1. 12013072 - Fluid shut-off system and shut-off method (2024-06-18),
2. 11391397 - Pipe structure and construction method (2022-07-19),
3. 11268643 - Piping structure and process and pipe construction method (2022-03-08),
4. 10989310 - Insertion of butterfly valve without disrupting flow (2021-04-27),
5. 10302234 - Flow-undisrupted process (2019-05-28),
6. 9644778 - Device for work implementation without stopping flow, and method for work implementation without stopping flow (2017-05-09),
7. 8726928 - Unit for boring without stopping passage of fluid (2014-05-20),
8. 8720465 - Device for work implementation without stopping flow, and method for work implementation without stopping flow (2014-05-13),
9. 8402992 - Branching unit for boring without stopping passage of fluid (2013-03-26),
10. 8156959 - Branching unit for boring without stopping passage of fluid (2012-04-17),
11. 8118331 - Non-bolt joint structure and method for producing non-bolt joint structure (2012-02-21),
12. D504495 - Gate valve (2005-04-26),
13. D495035 - Gate valve (2004-08-25),
14. 6622747 - Cutting, valve insertion and corrosion-resistant works without fluid supply interruption (2003-09-23),
15. 6615859 - Fluid supply interruption free method of construction (2003-09-09),
Company Overview
Suiken Co., Ltd. is a Japanese company based in Shiga, specializing in the development and manufacturing of advanced water treatment systems and related technologies. The organization focuses on providing innovative solutions for water purification and management, catering to various industries including municipal, industrial, and agricultural sectors. With a commitment to sustainability, Suiken aims to enhance water quality and promote efficient resource use, contributing to environmental preservation and public health.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

Suiken Co., Ltd. USPTO Patent Assignee Logo
20 Patents

#13 in Shiga

#2,946 in Japan

#31,315 in the World

Shiga, JP
Shiga, Japan

Suiken Co., Ltd.

Forward Citations = 106

10 inventors:

goldMedal Toshiyuki Sato (12 out of 16 patents)

silverMedal Tamotsu Yamashita (8 out of 12 patents)

bronzeMedal Taihei Yokoyama (4 out of 4 patents)

4.  Yasunari Sato (3 out of 3 patents)

5.  Gumpei Yokoyama (2 out of 2 patents)

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