This inventor holds 1 USPTO granted patent. Top assignees: Chubu Electric Power Company, Inc., Hitachi, Ltd., The Chugoku Electric Power Co., Inc.. Active years: 1982.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Okajima. Retrieved from https://idiyas.com/inventor/hiroyuki-okajima-64058kdr
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 = 7.0
ph-index = 1
Forward Citations = 27(Granted Patents)
Company Filing History:
1 out of 80 
Chubu Electric Power Company, Inc.
1 out of 42,740 
Hitachi, Ltd.
1 out of 67 
The Chugoku Electric Power Co., Inc.
4. 1 out of 177
The Tokyo Electric Power Company, Incorporated
5. 1 out of 66
Tohoku Electric Power Company, Inc.
where one patent can have more than one assignee
Years Active: 1982
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1 patent (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: Hiroyuki Okajima. Retrieved from https://idiyas.com/inventor/hiroyuki-okajima-64058kdr
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]