This inventor holds 2 USPTO granted patents. Top assignees: Sumitomo Heavy Industries, Ltd., Sumitomo Metal Industries, Inc.. Active years: 1989-1998.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshitaka Ishikawa. Retrieved from https://idiyas.com/inventor/yoshitaka-ishikawa-kfukx0s1
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 = 3.1
ph-index = 2
Forward Citations = 18(Granted Patents)
Location History:
- Tokyo, JP (1989)
- Chiba, JP (1998)
Company Filing History:
2 out of 1,262 
Sumitomo Heavy Industries, Ltd.
1 out of 929 Sumitomo Metal Industries, Inc.
where one patent can have more than one assignee
Years Active: 1989-1998
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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: Yoshitaka Ishikawa. Retrieved from https://idiyas.com/inventor/yoshitaka-ishikawa-kfukx0s1
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]