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Mark Van Houwelingen
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Knoxville, IA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Apparatus for directional boring under mixed conditions
Patent number
RE44427
Issue date
Aug 13, 2013
Vermeer Manufacturing Company
Randy R. Runquist
175 - Boring or penetrating the earth
Information
Patent Grant
Steerable fluid hammer
Patent number
6,659,202
Issue date
Dec 9, 2003
Vermeer Manufacturing Company
Randy Runquist
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method and apparatus for directional boring under mixed conditions
Patent number
6,588,516
Issue date
Jul 8, 2003
Vermeer Manufacturing Company
Randy R. Runquist
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method and apparatus for directional boring under mixed conditions
Patent number
6,516,899
Issue date
Feb 11, 2003
Earth Tool Company, L.L.C.
Steven W. Wentworth
E21 - EARTH DRILLING MINING
Information
Patent Grant
Directional drilling machine and method of directional drilling
Patent number
6,491,115
Issue date
Dec 10, 2002
Vermeer Manufacturing Company
Mark Van Houwelingen
E21 - EARTH DRILLING MINING
Information
Patent Grant
Apparatus for directional boring under mixed conditions
Patent number
6,454,025
Issue date
Sep 24, 2002
Vermeer Manufacturing Company
Randy R. Runquist
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method and apparatus for directional boring under mixed conditions
Patent number
6,439,319
Issue date
Aug 27, 2002
Earth Tool Company, L.L.C.
Steven W. Wentworth
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method and apparatus for directional boring under mixed conditions
Patent number
6,390,207
Issue date
May 21, 2002
Earth Tool Company, L.L.C.
Steven W. Wentworth
E21 - EARTH DRILLING MINING
Information
Patent Grant
Directional drilling machine and method of directional drilling
Patent number
6,357,537
Issue date
Mar 19, 2002
Vermeer Manufacturing Company
Randy Runquist
E21 - EARTH DRILLING MINING
Information
Patent Grant
Directional boring
Patent number
5,778,991
Issue date
Jul 14, 1998
Vermeer Manufacturing Company
Randy R. Runquist
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Method and apparatus for directional boring under mixed conditions
Publication number
20030024739
Publication date
Feb 6, 2003
Vermeer Manufacturing Company
Randy R. Runquist
E21 - EARTH DRILLING MINING
Information
Patent Application
Steerable fluid hammer
Publication number
20020084109
Publication date
Jul 4, 2002
Randy Runquist
E21 - EARTH DRILLING MINING
Information
Patent Application
Method and apparatus for directional boring under mixed conditions
Publication number
20020043406
Publication date
Apr 18, 2002
Steven W. Wentworth
E21 - EARTH DRILLING MINING
Information
Patent Application
Method and apparatus for directional boring under mixed conditions
Publication number
20020011355
Publication date
Jan 31, 2002
Steven W. Wentworth
E21 - EARTH DRILLING MINING