Assignee
DREXEL OILFIELD SERVICES INC
US·3 granted patents·181 citations·filing 1989–1994
Top patents by PatentIndex Score
3 records- 0197US5490598AScreen for vibrating separatorDREXEL OILFIELD SERVICES INC·Filed 1994·Granted Feb 13, 1996·101 cites·22 claims
- 0280US4943031ABlowout preventerDREXEL OILFIELD SERVICES INC·Filed 1989·Granted Jul 24, 1990·38 cites·5 claims
- 0364US5361832AAnnular packer and insertDREXEL OILFIELD SERVICES INC·Filed 1993·Granted Nov 8, 1994·42 cites·32 claims
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