Assignee
DUHN REX E
US·5 granted patents·28 citations·filing 2002–2023
Technology mixE21B5
Top patents by PatentIndex Score
5 records- 0191US8272433B2Wellhead isolation tool and wellhead assembly incorporating the sameDUHN REX E·Filed 2010·Granted Sep 25, 2012·11 cites·12 claims
- 0287US11976542B1Frac distribution towerDUHN REX E·Filed 2023·Granted May 7, 2024·1 cites·22 claims
- 0385US8333237B2Wellhead isolation tool and wellhead assembly incorporating the sameDUHN REX E·Filed 2012·Granted Dec 18, 2012·6 cites·17 claims
- 0466USRE43773EDrilling quick connectorsDUHN REX E·Filed 2006·Granted Oct 30, 2012·7 cites·110 claims
- 0540USRE43697EDrilling quick connectorsDUHN REX E·Filed 2002·Granted Oct 2, 2012·3 cites·62 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →