Des Moines, IA, United States of America

Siebolt Hettinga


USPTO Granted Patents = 2

Forward Citations = 15

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3 inventors (with patents filed for the assignee):

goldMedal Richard D Osborne (2 out of 2 patents)

silverMedal Mark W Spicer (1 out of 5 patents)

bronzeMedal Berton G Whited (1 out of 1 patent)


2 patents:

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USPTO Data Jan 1 1976 - Dec 9 2025

2 Patents

#67 in Des Moines, IA

#573 in Iowa

#92,600 in US

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Des Moines, IA, United States of America
Forward Citations = 15

3 inventors:

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