Fairfield, IA, United States of America

Harper Corporation


USPTO Granted Patents = 2

Trademarks = 1

Forward Citations = 15

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3 inventors (with patents filed for the assignee):

goldMedal Terrence Treacy (1 out of 11 patents)

silverMedal David J Greubel (1 out of 1 patent)

bronzeMedal Jeff Campbell (1 out of 1 patent)


2 patents:

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#7 in Fairfield, IA

#573 in Iowa

#92,554 in US

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Fairfield, IA, United States of America
Forward Citations = 15

3 inventors:

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