JP

Yokoyama Sankoh Co., Ltd.


USPTO Granted Patents = 3

Forward Citations = 70

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3 inventors (with patents filed for the assignee):

goldMedal Yoshimasa Yokoyama (2 out of 10 patents)

silverMedal Masahiro Yamamoto (1 out of 72 patents)

bronzeMedal Yokoyama Yoshimasa (1 out of 1 patent)


3 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

3 Patents

#455 in

#8,780 in Japan

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JP
Forward Citations = 70

3 inventors:

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