Assignee
RANKIN E EDWARD
5 granted patents·2 pending applications·58 citations·filing 1979–2013
Technology mixE21B7
Top patents by PatentIndex Score
7 records- 0161US9249639B2Drilling fluid diverting subRANKIN E EDWARD·Filed 2011·Granted Feb 2, 2016·2 cites·11 claims
- 0256US4699216ABlowout preventer for a side entry subRANKIN E EDWARD·Filed 1986·Granted Oct 13, 1987·26 cites·12 claims
- 0351US4678038ASide entry sub well logging apparatus and methodRANKIN E EDWARD·Filed 1986·Granted Jul 7, 1987·17 cites·15 claims
- 0446US4278127AApparatus for retrieving drill collarsRANKIN E EDWARD·Filed 1979·Granted Jul 14, 1981·13 cites·3 claims
- 0544US9022114B2Cement shoe and method of cementing well with open hole below the shoeRANKIN E EDWARD·Filed 2012·Granted May 5, 2015·0 cites·16 claims
- 0641US2013233620A1Stabilizer with Drilling Fluid Diverting PortsRANKIN E EDWARD·Filed 2013·Application pending·0 cites
- 0739US2012073820A1Chemical Injector for WellsRANKIN E EDWARD·Filed 2011·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →