both of, Japan

Duplo Manufacturing Corp.


USPTO Granted Patents = 3

Forward Citations = 94

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4 inventors (with patents filed for the assignee):

goldMedal Yoshihide Sugiyama (2 out of 9 patents)

silverMedal Tetsuo Onishi (2 out of 2 patents)

bronzeMedal Ken Matsushita (2 out of 2 patents)

4 Hiroki Ikeda (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

3 Patents

#36 in both of

#8,780 in Japan

...
both of, Japan
Forward Citations = 94

4 inventors:

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