Assignee
ALHAUG ESPEN
NO·4 granted patents·5 citations·filing 2010–2012
Top patents by PatentIndex Score
4 records- 0173US8770628B2Seal assembly for nested dual drill pipeALHAUG ESPEN·Filed 2012·Granted Jul 8, 2014·5 cites·16 claims
- 0235US9267344B2Actuator for dual drill string valve and drill string valve configurations thereforeALHAUG ESPEN·Filed 2012·Granted Feb 23, 2016·0 cites·11 claims
- 0335US9169715B2Down hole well tool provided with a pistonALHAUG ESPEN·Filed 2010·Granted Oct 27, 2015·0 cites·5 claims
- 0435US8997871B2Actuator for dual drill string valve and rotary drill string valve configuration thereforALHAUG ESPEN·Filed 2012·Granted Apr 7, 2015·0 cites·6 claims
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