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USPTO Data Jan 1 1976 - Oct 20 2026
1 Patents
#350 in Aichi
#15,759 in Japan
Ngk Spark Plug Cc., Ltd.
Forward Citations = 1
3 inventors:
Ngk Spark Plug Cc., Ltd.
% Expired Patents = 100.0
Forward Citations = 1
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3 inventors (with patents filed for the assignee):
Takeshi Yamaguchi (1 out of 9 patents)
Kazuho Tatematsu (1 out of 6 patents)
Masahiro Konishi (1 out of 21 patents)
1 patent:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ngk Spark Plug Cc., Ltd.. Retrieved from https://idiyas.com/company/ngk-spark-plug-cc
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]
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]
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]