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For the Inventor, By the Inventor

Chiba, Japan

Katsutomo Ohzeki

This inventor holds 3 USPTO granted patents and 2 EPO patents. Top assignees: Showa Denko Materials Co., Ltd., Hitachi Chemical Company, Ltd.. Active years: 2020-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsutomo Ohzeki. Retrieved from https://idiyas.com/inventor/katsutomo-ohzeki

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 3

% Patents Active = 100.0


Average Co-Inventor Count = 5.0

ph-index = 1


Company Filing History:

goldMedal2 out of 139 
 
Showa Denko Materials Co., Ltd.
 patents
silverMedal1 out of 1,641 
 
Hitachi Chemical Company, Ltd.
 patents

Years Active: 2020-2022

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3 patents (USPTO):Explore Patents
1. 11251421 - Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery (2022-02-15),
2. 10892482 - Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery (2021-01-12),
3. 10693130 - Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery (2020-06-23),
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]
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