This inventor holds 2 USPTO granted patents. Top assignees: Toho Titanium Co., Ltd., Nippon Steel Corporation. Active years: 1986-1989.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaaki Koizumi. Retrieved from https://idiyas.com/inventor/masaaki-koizumi
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
% Patents Active = 100.0
Average Co-Inventor Count = 4.0
ph-index = 2
Forward Citations = 14(Granted Patents)
Location History:
- Yokohama, JP (1986)
- Chigasaki, JP (1989)
Company Filing History:
2 out of 133 
Toho Titanium Co., Ltd.
1 out of 3,713 Nippon Steel Corporation
where one patent can have more than one assignee
Years Active: 1986-1989
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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: Masaaki Koizumi. Retrieved from https://idiyas.com/inventor/masaaki-koizumi
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]