Ardis L. Holte

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Eugene, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit assembly
- Patent number 7,185,717
- Issue date Mar 6, 2007
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation drilling system with bit locked underreamer arms
- Patent number 6,394,197
- Issue date May 28, 2002
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation drilling system with bit locked underreamer arms
- Patent number 6,209,665
- Issue date Apr 3, 2001
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation drilling system with bit locked underreamer arms
- Patent number 5,975,222
- Issue date Nov 2, 1999
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation drilling system with hexagonal pipe coupling
- Patent number 5,957,226
- Issue date Sep 28, 1999
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill bit retainer for a down hole hammer assembly
- Patent number 5,803,192
- Issue date Sep 8, 1998
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill bit with set of underreamer arms
- Patent number 5,787,999
- Issue date Aug 4, 1998
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pneumatic drill with central evacuation outlet
- Patent number 5,511,628
- Issue date Apr 30, 1996
- Ardis L. Holte
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Extensible equipment mast
- Publication number 20080129029
- Publication date Jun 5, 2008
- Ardis L. Holte
- B66 - HOISTING LIFTING HAULING
Information Patent Application
Drill bit assembly
- Publication number 20060027399
- Publication date Feb 9, 2006
- Ardis L. Holte
- E21 - EARTH DRILLING MINING
Information Patent Application
Method of forming concrete pilings using a reverse circulation dril...
- Publication number 20040182607
- Publication date Sep 23, 2004
- Ardis L. Holte
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Application
Reverse circulation drilling system with bit locked underreamer arms
- Publication number 20020139585
- Publication date Oct 3, 2002
- Ardis L. Holte
- E21 - EARTH DRILLING MINING