Stephen V. R. Hellriegel has been granted 19 US patents while listed as an inventor at Cray. The first was granted in 2002 and the most recent in August 2016. Stephen V. R. Hellriegel ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list Stephen V. R. Hellriegel in Bainbridge Island, WA, US.