Troy, MI, United States of America

Graph-tech, Inc.


USPTO Granted Patents = 5

Trademarks = 1

Forward Citations = 40

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4 inventors (with patents filed for the assignee):

goldMedal Hiroshi Ohtsuka (3 out of 3 patents)

silverMedal Takahisa Umezawa (3 out of 3 patents)

bronzeMedal Ralph E Roper (1 out of 19 patents)

4 James R Loudon (1 out of 1 patent)


5 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

5 Patents

#110 in Troy, MI

#1,685 in Michigan

#50,165 in US

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Troy, MI, United States of America
Forward Citations = 40

4 inventors:

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