Inventor · disambiguated record

Ralph L. Clarke

Also filed as: CLARKE RALPH L

2 granted patents·74 citations·filing 1994–2005

66Inventor score

Technology areasE21B

Files withRPM TOOLS INC1

Top patents by PatentIndex Score

2 records

0168US5458208ADirectional drilling using a rotating slide subFiled 1994·Granted Oct 17, 1995·60 cites·20 claims
0263US7311157B1Tool for controlling rotation of a bottom hole assembly with respect to a drillstringRPM TOOLS INC·Filed 2005·Granted Dec 25, 2007·14 cites·20 claims

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