J. Stanley Davis

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Sandy, UT, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for coring with an in situ core barrel sponge
- Patent number 4,716,974
- Issue date Jan 5, 1988
- Eastman Christensen Co.
- Steven R. Radford
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic inner barrel in a drill string coring tool
- Patent number 4,664,205
- Issue date May 12, 1987
- Norton Christensen, Inc.
- Kelly Knighton
- E21 - EARTH DRILLING MINING
Information Patent Grant
Self activating, positively driven concealed core catcher
- Patent number 4,606,416
- Issue date Aug 19, 1986
- Norton Christensen, Inc.
- Kelly Knighton
- E21 - EARTH DRILLING MINING
Information Patent Grant
Shrouded core catcher
- Patent number 4,605,075
- Issue date Aug 12, 1986
- Norton Christensen, Inc.
- Steven R. Radford
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for downward displacement of an inner tube within a corin...
- Patent number 4,603,749
- Issue date Aug 5, 1986
- Norton Christensen, Inc.
- J. Stanley Davis
- E21 - EARTH DRILLING MINING