JD

John E. Demmer

DE Demmer: 2 patents #1 of 8Top 15%
Overall (All Time): #1,289,600 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5557964 Double plane bend former Richard E. Jessop 1996-09-24
5481897 Double plane bend former Richard E. Jessop 1996-01-09
D271129 Solar collector for a swimming pool 1983-10-25
4406278 Heat exchange assembly for swimming pool 1983-09-27