HM

Herbert W. Markwardt

EI Encon Industries: 5 patents #2 of 2Top 100%
Overall (All Time): #885,754 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6158515 Artificial lifting device for well fluids using a continous loop Richard H. Greer, Stephen B. Markwardt, Walter R. Shaw, John R. Watson 2000-12-12
D348512 Ceiling fan motor housing Michael A. Markwardt 1994-07-05
D322475 Combined electric ceiling fan and light Michael A. Markwardt 1991-12-17
D321933 Combined electric ceiling fan and light or the like Michael A. Markwardt 1991-11-26
4878806 Dual mounting ceiling fan 1989-11-07
4729725 Mounting system for selectively mounting ceiling fans 1988-03-08