Daniel Kessler has been granted 3 US patents while listed as an inventor at Endress+Hauser Flowtec Ag. The first was granted in 1997 and the most recent in September 2025. Daniel Kessler ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Daniel Kessler in Frenkendorf, IL, CH.