DH

Douglas W. Hartford

AG Amesbury Group: 2 patents #26 of 57Top 50%
📍 Sandown, NH: #24 of 52 inventorsTop 50%
🗺 New Hampshire: #5,349 of 12,181 inventorsTop 45%
Overall (All Time): #2,262,982 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5788889 Process for extruding low density foam using water blowing agent Alan J. DeMello, Peter Mertinooke, Dan C. Muessel, Louis Halberstadt 1998-08-04
5607629 Process for extruding low density foam using water as a blowing agent Alan J. DeMello, Peter Mertinooke, Dan C. Muessel, Louis Halberstadt 1997-03-04