This inventor holds 4 USPTO granted patents. Top assignees: Hitachi Maxell, Limited, Kanto Denka Kogyo Co., Ltd.. Active years: 2013-2016.
IDiyas Innovation Intelligence. (2026). Inventor Profile: Kumiko Ishizuka. Retrieved from https://idiyas.com/inventor/kumiko-ishizuka
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 = 3.3
ph-index = 2
Forward Citations = 13(Granted Patents)
Location History:
- Ibaraki, JP (2013 - 2014)
- Osaka, JP (2014 - 2016)
Company Filing History:
4 out of 1,112 Hitachi Maxell, Limited
1 out of 77 
Kanto Denka Kogyo Co., Ltd.
where one patent can have more than one assignee
Years Active: 2013-2016
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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: Kumiko Ishizuka. Retrieved from https://idiyas.com/inventor/kumiko-ishizuka
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]