DeVaughn Lawrence Rackham has been granted 8 US patents while listed as an inventor at IBM. The first was granted in 2001 and the most recent in April 2012. DeVaughn Lawrence Rackham ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list DeVaughn Lawrence Rackham in Rochester, MN, US.