DH

Dennis R. Hughes

AH Aos Holding: 18 patents #1 of 96Top 2%
AS A. O. Smith: 6 patents #25 of 319Top 8%
RS R.R. Donnelly & Sons: 1 patents #2 of 9Top 25%
📍 Hartford, WI: #8 of 200 inventorsTop 4%
🗺 Wisconsin: #1,267 of 40,088 inventorsTop 4%
Overall (All Time): #154,852 of 4,157,543Top 4%
26
Patents All Time

Issued Patents All Time

Showing 26–26 of 26 patents

Patent #TitleCo-InventorsDate
4577681 Heat exchanger having a turbulator construction — 1986-03-25