GW

Graham D. Walmsley

HM Hickory Springs Manufacturing: 5 patents #5 of 69Top 8%
📍 Matlock, NC: #2 of 4 inventorsTop 50%
Overall (All Time): #888,857 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5656678 Method and apparatus for the production of polyurethane foam using variable capacity trough 1997-08-12
5569682 Fire-retardant polyurethane foams and method of producing 1996-10-29
5536757 Polyurethane foams 1996-07-16
5506278 Polyurethane foams 1996-04-09
5120771 Process for the production of polyurethane foam 1992-06-09
4246356 Foam manufacture using two catalysts and a vaporizable auxiliary blowing agent 1981-01-20