SL

Sidney Lieberman

DC Dorma Door Controls: 2 patents #2 of 11Top 20%
Overall (All Time): #2,363,088 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4419787 Door closer assist linkage — 1983-12-13
4394787 Hydraulic door closer construction — 1983-07-26