% Expired Patents = 100.0

Forward Citations = 2

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6 inventors (with patents filed for the assignee):

Takashi Yuzawa (2 out of 28 patents)

Hironori Kuriki (2 out of 10 patents)

Tatsushi Sato (2 out of 31 patents)

4. Tamayo Ohata (2 out of 3 patents)

5. Hisakatsu Kawarai (2 out of 8 patents)

6. Jyunji Tanimura (2 out of 2 patents)

2 patents: Sort by Forward Citations

1. 9056361 - Liquid-quality adjusting apparatus, liquid-quality adjusting method, and wire electric discharge machining apparatus (2015-06-16),

2. 8753516 - Corrosion preventing apparatus, corrosion preventing method, and wire electric discharge machining apparatus (2014-06-17),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

2 Patents

#250 in Aichi

#11,133 in Japan

Aichi, Japan

Ryoden Koki Engineering Co., Ltd.

Forward Citations = 2

6 inventors:

Takashi Yuzawa (2 out of 28 patents)

Hironori Kuriki (2 out of 10 patents)

Tatsushi Sato (2 out of 31 patents)

4. Tamayo Ohata (2 out of 3 patents)

5. Hisakatsu Kawarai (2 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ryoden Koki Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/ryoden-koki-engineering-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]