This inventor holds 2 USPTO granted patents. Top assignees: Sumitomo Rubber Industries Limited, Japanese National Railways, Sumitomo Electric Industries, Limited. Active years: 1977-1987.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumi Matsui. Retrieved from https://idiyas.com/inventor/kazumi-matsui-p8k65wca
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Calculating rank
% Patents Active = 100.0
Average Co-Inventor Count = 5.5
ph-index = 2
Forward Citations = 7(Granted Patents)
Location History:
- Tokyo, JA (1977)
- Aichi, JP (1987)
Company Filing History:
2 out of 4,551 
Sumitomo Rubber Industries Limited
1 out of 50 Japanese National Railways
1 out of 10,652 
Sumitomo Electric Industries, Limited
where one patent can have more than one assignee
Years Active: 1977-1987
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2 patents (USPTO):Explore Patents
Profile summary based on public USPTO records.
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]
IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumi Matsui. Retrieved from https://idiyas.com/inventor/kazumi-matsui-p8k65wca
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]
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]