Yasuharu Sakai (2 out of 6 patents)
Kazuhiro Matsui (2 out of 42 patents)
Company Badge
USPTO Data Jan 1 1976 - Oct 27 2026
2 Patents
#48 in both of
#11,147 in Japan
Proto Planning Co.
Forward Citations = 18
2 inventors:
Proto Planning Co.
Calculating rank
Forward Citations = 18
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2 inventors (with patents filed for the assignee):
2 patents:
IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Proto Planning Co.. Retrieved from https://idiyas.com/company/proto-planning-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]
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]