This inventor holds 3 USPTO granted patents. Top assignees: Yokogawa Electric Works, Ltd., Kogawa Hokushin Electric Corporation. Active years: 1980-1986.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirotoshi Ishikawa. Retrieved from https://idiyas.com/inventor/hirotoshi-ishikawa
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 = 2.9
ph-index = 3
Forward Citations = 38(Granted Patents)
Location History:
- Musashino, JP (1980)
- Tokyo, JP (1982 - 1986)
Company Filing History:
2 out of 48 
Yokogawa Electric Works, Ltd.
1 out of 1 Kogawa Hokushin Electric Corporation
Years Active: 1980-1986
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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: Hirotoshi Ishikawa. Retrieved from https://idiyas.com/inventor/hirotoshi-ishikawa
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]