Michael D. Gandrud has been granted 17 US patents while listed as an inventor at Sauer-Danfoss. The first was granted in 2003 and the most recent in August 2016. Michael D. Gandrud ranks #263,971 of 4,157,543 US inventors in our database (top 6.3%). Patent records list Michael D. Gandrud in Ames, IA, US.