Daniel E. Ertel has been granted 20 US patents while listed as an inventor at Dorner Mfg.. The first was granted in 1996 and the most recent in January 2025. Daniel E. Ertel ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Daniel E. Ertel in Oconomowoc, WI, US.