2 Patents
#67 in Des Moines, IA
#573 in Iowa
#92,600 in US
Siebolt Hettinga
Forward Citations = 15
3 inventors:
Des Moines, IA, United States of America
3 inventors (with patents filed for the assignee):
Richard D Osborne (2 out of 2 patents)
Mark W Spicer (1 out of 5 patents)
Berton G Whited (1 out of 1 patent)
2 patents:
#67 in Des Moines, IA
#573 in Iowa
#92,600 in US
3 inventors: