Individual holder
OLDHAM JACK T
US·5 granted patents·20 citations·filing 2011–2011
Individually held — no corporate assignee on record.
Technology mixE21B5
Top patents by PatentIndex Score
5 records- 0189US8167059B2Casing and liner drilling shoes having spiral blade configurations, and related methodsOLDHAM JACK T·Filed 2011·Granted May 1, 2012·8 cites·20 claims
- 0281US8225887B2Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methodsOLDHAM JACK T·Filed 2011·Granted Jul 24, 2012·4 cites·21 claims
- 0381US8205693B2Casing and liner drilling shoes having selected profile geometries, and related methodsOLDHAM JACK T·Filed 2011·Granted Jun 26, 2012·4 cites·21 claims
- 0476US8225888B2Casing shoes having drillable and non-drillable cutting elements in different regions and related methodsOLDHAM JACK T·Filed 2011·Granted Jul 24, 2012·3 cites·21 claims
- 0566US8297380B2Casing and liner drilling shoes having integrated operational components, and related methodsOLDHAM JACK T·Filed 2011·Granted Oct 30, 2012·1 cites·17 claims
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