David G. Hackbarth has been granted 3 US patents while listed as an inventor at U.S. Controls. The first was granted in 1996 and the most recent in April 1999. David G. Hackbarth ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David G. Hackbarth in New Berlin, WI, US.