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Patentes

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Patente citante Fecha de presentación Fecha de emisión Cesionario original Título
US44523215 Oct 19815 Jun 1984Craelius ABDevice in core barrels
US480096924 Nov 198731 Ene 1989Longyear CompanyFast descent core barrel apparatus
US502061222 Feb 19904 Jun 1991Boart International LimitedWire line core drilling apparatus
US52676208 Abr 19927 Dic 1993Longyear CompanyDrilling latch apparatus
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US621680429 Jul 199817 Abr 2001Apparatus for recovering core samples under pressure
US623082530 Jun 200015 May 2001Apparatus for recovering core samples under pressure
US630548230 Jun 200023 Oct 2001Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport
US637863130 Jun 200030 Abr 2002Apparatus for recovering core samples at in situ conditions
US66592048 Feb 20019 Dic 2003Japan National Oil CorporationMethod and apparatus for recovering core samples under pressure
US79219266 Ene 200912 Abr 2011Longyear TM, Inc.Jointed spearhead assembly
USD62229315 Dic 200924 Ago 2010Longyear TM, Inc.Spearhead
USD62229416 Dic 200924 Ago 2010Longyear TM, Inc.Spearhead base
USD62274116 Dic 200931 Ago 2010Longyear TM, Inc.Spearhead
USD62456415 Dic 200928 Sep 2010Longyear TM, Inc.Spearhead base