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For the Inventor, By the Inventor

Atsugi-shi, Japan

Kouken Company, Limited

Calculating rank
USPTO Granted Patents = 14

% Expired Patents = 21.4



Forward Citations = 82

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1 inventor (with patents filed for the assignee):

goldMedal Kesafumi Matsumoto (14 out of 15 patents)


14 patents:

1. 7884505 - Dry-type high-voltage load system apparatus and method of preventing chain breaking and arc discharge for use therewith (2011-02-08),
2. 7847439 - Dry-type high-voltage load system apparatus and method of preventing chain breaking and arc discharge for use therewith (2010-12-07),
3. 7712583 - Method and apparatus for controlling automatic lifting and lowering type platform (2010-05-11),
4. 7535126 - Dry-type high-voltage load system device and method for preventing chain disconnection/arc discharge of the device (2009-05-19),
5. 7218201 - High pressure resistance body element (2007-05-15),
6. 6608392 - Method for installing and removing automatic lift-type mobile facility, method of automatic lift-type power generation, and automatic lift-type mobile facility (2003-08-19),
7. 6546312 - Method for installing and removing automatic lift-type mobile facility, method of automatic lift-type power generation, and automatic lift-type mobile facility (2003-04-08),
8. 6532398 - Method for installing and removing automatic lift-type mobile facility, method of automatic lift-type power generation, and automatic lift-type mobile facility (2003-03-11),
9. 5746119 - Method and utensil for cooking food with heat (1998-05-05),
10. 5580594 - Method for cooking food with eddy-current generated heat (1996-12-03),
11. 4984623 - Electrode water circulation and processing system and hooded radiator (1991-01-15),
12. 4939500 - Electrode water circulation and processing system and hooded radiator (1990-07-03),
13. 4910457 - Water resistance load system (1990-03-20),
14. 4853621 - Water resistance load system (1989-08-01),
Company Overview
Kouken Company, Limited, based in Atsugi-shi, Japan, specializes in the development and manufacturing of precision measurement instruments and systems. The company focuses on providing innovative solutions for various industries, including automotive, aerospace, and electronics, enhancing quality control and operational efficiency. With a commitment to advanced technology and research, Kouken plays a significant role in the evolution of measurement standards, contributing to the precision engineering landscape both domestically and internationally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

14 Patents

#1 in Atsugi-shi

#3,586 in Japan

#42,333 in the World

Atsugi-shi, JP
Atsugi-shi, Japan

Kouken Company, Limited

Forward Citations = 82

1 inventor:

goldMedal Kesafumi Matsumoto (14 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kouken Company, Limited. Retrieved from https://idiyas.com/company/kouken-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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