This inventor holds 4 USPTO granted patents. Top assignees: Idemitsu Kosan Company, Limited, Nissan Motor Company Limited, Research Association for Petroleum Alternatives Development. Active years: 1987-1995.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiaki Hayasaka. Retrieved from https://idiyas.com/inventor/toshiaki-hayasaka
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 = 2.5
ph-index = 3
Forward Citations = 18(Granted Patents)
Company Filing History:
3 out of 2,283 
Idemitsu Kosan Company, Limited
1 out of 13,420 
Nissan Motor Company Limited
1 out of 15 Research Association for Petroleum Alternatives Development
where one patent can have more than one assignee
Years Active: 1987-1995
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4 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: Toshiaki Hayasaka. Retrieved from https://idiyas.com/inventor/toshiaki-hayasaka
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]