This inventor holds 3 USPTO granted patents. Top assignees: Hitachi, Ltd., Tomoegawa Paper Co., Inc.. Active years: 1990-1991.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuo Hirasawa. Retrieved from https://idiyas.com/inventor/yasuo-hirasawa
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 = 5.2
ph-index = 2
Forward Citations = 7(Granted Patents)
Location History:
- Ome, JP (1990)
- Tokyo, JP (1990 - 1991)
Company Filing History:
3 out of 42,731 
Hitachi, Ltd.
2 out of 209 
Tomoegawa Paper Co., Inc.
where one patent can have more than one assignee
Years Active: 1990-1991
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3 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: Yasuo Hirasawa. Retrieved from https://idiyas.com/inventor/yasuo-hirasawa
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]