Alexander I. Wallstein

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Laguna Beach, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Low profile mine roof support
- Patent number 7,802,943
- Issue date Sep 28, 2010
- DSI Ground Support Inc.
- Roland Walker
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cable coupler having retained wedges
- Patent number 7,690,868
- Issue date Apr 6, 2010
- DSI Ground Support Inc.
- Alexander I. Wallstein
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Cable coupler having retained wedges
- Patent number 7,384,216
- Issue date Jun 10, 2008
- Dywidag-Systems International USA
- Alexander I. Wallstein
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Truss shoe for a mine roof and method
- Patent number 7,118,310
- Issue date Oct 10, 2006
- Dywidag-Systems International, U.S.A., Inc.
- Alexander I. Wallstein
- E04 - BUILDING
Information Patent Grant
Wedge barrel for a twin cable mine roof bolt
- Patent number 7,066,688
- Issue date Jun 27, 2006
- Dywidag-Systems International USA
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Grant
Wedge barrel for a mine roof cable bolt
- Patent number 6,881,015
- Issue date Apr 19, 2005
- Dywidag-Systems International, U.S.A., Inc.
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Cable Coupler Having Retained Wedges
- Publication number 20100080649
- Publication date Apr 1, 2010
- DSI GROUND SUPPORT INC.
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Application
Low Profile Mine Roof Support
- Publication number 20090180841
- Publication date Jul 16, 2009
- Roland Walker
- E21 - EARTH DRILLING MINING
Information Patent Application
Cable Coupler Having Retained Wedges
- Publication number 20090022544
- Publication date Jan 22, 2009
- DSI GROUND SUPPORT INC.
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Application
Cable coupler having retained wedges
- Publication number 20060211311
- Publication date Sep 21, 2006
- DYWIDAG-SYSTEMS INTERNATIONAL USA
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Application
WEDGE BARREL FOR A TWIN CABLE MINE ROOF BOLT
- Publication number 20060083593
- Publication date Apr 20, 2006
- DYWIDAG-SYSTEMS INTERNATIONAL USA
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Application
Truss shoe for a mine roof and method
- Publication number 20050115188
- Publication date Jun 2, 2005
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING
Information Patent Application
Wedge barrel for a mine roof cable bolt
- Publication number 20040135422
- Publication date Jul 15, 2004
- Alexander I. Wallstein
- E21 - EARTH DRILLING MINING