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For the Inventor, By the Inventor

Tokushima, Japan

Daisho Denki Inc.


USPTO Granted Patents = 3

% Expired Patents = 33.3


Forward Citations = 37

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2 inventors (with patents filed for the assignee):

goldMedal Yoshio Monjo (3 out of 3 patents)

silverMedal Tomoaki Inuzuka (1 out of 3 patents)


3 patents:

1. 9462653 - Illumination system (2016-10-04),
2. 7073922 - Lighting fixture (2006-07-11),
3. 6490006 - Chroma key system for discriminating between a subject and a background of the subject based on a changing background color (2002-12-03),
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USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#20 in Tokushima

#8,929 in Japan

Tokushima, JP
Tokushima, Japan

Daisho Denki Inc.

Forward Citations = 37

2 inventors:

goldMedal Yoshio Monjo (3 out of 3 patents)

silverMedal Tomoaki Inuzuka (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Daisho Denki Inc.. Retrieved from https://idiyas.com/company/daisho-denki

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]
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