D.t. Circuit Technology Co., Ltd.

Calculating rank

USPTO Granted Patents = 2

% Expired Patents = 50.0

Forward Citations = 42

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6 inventors (with patents filed for the assignee):

Yuji Yamaguchi (2 out of 49 patents)

Hiroshi Yagi (2 out of 78 patents)

Osamu Shimada (2 out of 41 patents)

4. Yoshitaka Fukuoka (2 out of 26 patents)

5. Tooru Serizawa (2 out of 8 patents)

6. Hiroyuki Hirai (2 out of 7 patents)

2 patents: Sort by Forward Citations

1. 7100276 - Method for fabricating wiring board provided with passive element (2006-09-05),

2. 6872893 - Wiring board provided with passive element and cone shaped bumps (2005-03-29),

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USPTO Data Jan 1 1976 - Oct 27 2026

2 Patents

#4,375 in Tokyo

#11,147 in Japan

Tokyo, Japan

D.t. Circuit Technology Co., Ltd.

Forward Citations = 42

6 inventors:

Yuji Yamaguchi (2 out of 49 patents)

Hiroshi Yagi (2 out of 78 patents)

Osamu Shimada (2 out of 41 patents)

4. Yoshitaka Fukuoka (2 out of 26 patents)

5. Tooru Serizawa (2 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: D.t. Circuit Technology Co., Ltd.. Retrieved from https://idiyas.com/company/d-t-circuit-technology-company

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]