Robert E. Sandstrom has been granted 14 US patents while listed as an inventor at ExxonMobil. The first was granted in 2004 and the most recent in June 2023. Robert E. Sandstrom ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Robert E. Sandstrom in Longview, WA, US.