DW

D. Wayne Van Winkle

DS Drexel Oil Field Services: 3 patents #1 of 4Top 25%
Overall (All Time): #1,049,933 of 4,157,543Top 30%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
5863022 Stripper/packer and blowout preventer with split bonnet — 1999-01-26
5590867 Blowout preventer for coiled tubing — 1997-01-07
5566753 Stripper/packer Bobby G. Hurst 1996-10-22
5361832 Annular packer and insert — 1994-11-08
4407361 Tool trap — 1983-10-04