Patent US2080978 - METHOD OF TAKING ORIENTED CORES

Patents

Inventors: Walter L. Church, Walter L. Church
Current U.S. Classification: 175/44; 33/304; 175/58; 175/248

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Citing Patent	Filing date	Issue date	Original Assignee	Title
US4311201	7 Apr 1980	19 Jan 1982	AMAX Inc.	Core sample orientation tool
US5450913	1 Oct 1993	19 Sep 1995	Gold Star Manufacturing, Inc.	Continuous soil sampling system and method
US7913768	14 Apr 2008	29 Mar 2011	Welltec A/S	Release device