Inventor · disambiguated record

David L. O'Donnell

Also filed as: O'DONNELL DAVID L

3 granted patents·320 citations·filing 1993–1995

79Inventor score

Technology areasE21B

Files withVARCO SHAFFER INC3

Top patents by PatentIndex Score

3 records

0186US5400857AOilfield tubular shear ram and method for blowout preventionVARCO SHAFFER INC·Filed 1993·Granted Mar 28, 1995·113 cites·20 claims
0280US5505426AHydraulically controlled blowout preventerVARCO SHAFFER INC·Filed 1995·Granted Apr 9, 1996·98 cites·20 claims
0379US5575452ABlowout preventer with ram wedge locksVARCO SHAFFER INC·Filed 1995·Granted Nov 19, 1996·109 cites·20 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →