Forward Citations = 27

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2 inventors (with patents filed for the assignee):

Susumu Watanabe (2 out of 20 patents)

Tomoaki Sumita (1 out of 2 patents)

2 patents: Sort by Forward Citations

1. 6311714 - Seismic detecting shut-down valve device (2001-11-06),

2. 6253391 - Safety system at a discharge port in a pool (2001-07-03),

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USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#18 in Fujisawa

#11,139 in Japan

Fujisawa, Japan

Nichigi Engineering Co., Ltd.

Forward Citations = 27

2 inventors:

Susumu Watanabe (2 out of 20 patents)

Tomoaki Sumita (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nichigi Engineering Co., Ltd.. Retrieved from https://idiyas.com/company/nichigi-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]