Suphan Kovenklioglu has been granted 3 US patents while listed as an inventor at Engelhard. The first was granted in 1993 and the most recent in June 1997. Suphan Kovenklioglu ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Suphan Kovenklioglu in Chatham, NJ, US.