Fuji, Japan

Yamakawa Industry Company Ltd.


USPTO Granted Patents = 3

Forward Citations = 70

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3 inventors (with patents filed for the assignee):

goldMedal Takuo Yuda (3 out of 21 patents)

silverMedal Masaaki Sugiyama (3 out of 3 patents)

bronzeMedal Akira Mizusawa (2 out of 31 patents)


3 patents:

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USPTO Data Jan 1 1976 - Dec 16 2025

3 Patents

#10 in Fuji

#8,766 in Japan

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Fuji, Japan
Forward Citations = 70

3 inventors:

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