Stephan Stipdonk has been granted 3 US patents while listed as an inventor at Elsevier B.V.. The first was granted in 2010 and the most recent in July 2013. Stephan Stipdonk ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Stephan Stipdonk in Leiden, NL.