Robert D. Eickhoff has been granted 4 US patents while listed as an inventor at Amco. The first was granted in 1989 and the most recent in July 1990. Robert D. Eickhoff ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Robert D. Eickhoff in Fountain, MN, US.