This inventor holds 3 USPTO granted patents and 1 published patent application, plus 3 CIPO patents and 1 EPO patent. Top assignees: Ricom Corporation, Mitsui Co., Ltd., Zeria Pharmaceutical Co., Ltd.. Active years: 1997-2007.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadao Hamaya. Retrieved from https://idiyas.com/inventor/tadao-hamaya
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
USPTO Granted Patents = 3 (Patent Applications = 1)
% Patents Active = 100.0
CIPO Patents = 3
EPO Patents = 1
Average Co-Inventor Count = 3.6
ph-index = 3
Forward Citations = 24(Granted Patents)
Location History:
- Ageo, JP (1997 - 1998)
- Bunkyo-ku, JP (2007)
Company Filing History:
3 out of 3 Ricom Corporation
2 out of 37 
Mitsui Co., Ltd.
1 out of 45 Zeria Pharmaceutical Co., Ltd.
4. 1 out of 1
Zeria Pharmaceuticals
where one patent can have more than one assignee
Years Active: 1997-2007
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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]
1 patent pending:
IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadao Hamaya. Retrieved from https://idiyas.com/inventor/tadao-hamaya
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]
3 patents (CIPO):
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]
1 patent (EPO):
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]