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David Sean Johnsen
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Wauwatosa, WI, US
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Patents Grants
last 30 patents
Information
Patent Grant
Plate handling system and a method of removing plates from rail ties
Patent number
6,863,717
Issue date
Mar 8, 2005
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Riding rail tie plugging apparatus
Patent number
6,832,558
Issue date
Dec 21, 2004
Nordco Inc.
Robert M. Weber
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Combined tie extractor and plate remover for rail maintenance
Patent number
6,755,135
Issue date
Jun 29, 2004
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Railroad machine centering system
Patent number
6,622,633
Issue date
Sep 23, 2003
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Bulk spike loading system
Patent number
6,095,053
Issue date
Aug 1, 2000
Nordco Inc.
David S. Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Grant
Fully automatic, multiple operation rail maintenance apparatus
Patent number
5,671,679
Issue date
Sep 30, 1997
Nordco Inc.
William D. Straub
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Patents Applications
last 30 patents
Information
Patent Application
Riding rail tie plugging apparatus
Publication number
20040069179
Publication date
Apr 15, 2004
Nordco Inc.
Robert M. Weber
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Application
Plate handling system and a method of removing plates from rail ties
Publication number
20030183116
Publication date
Oct 2, 2003
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Application
RAILROAD MACHINE CENTERING SYSTEM
Publication number
20030183115
Publication date
Oct 2, 2003
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information
Patent Application
Combined tie extractor and plate remover for rail maintenance
Publication number
20030005850
Publication date
Jan 9, 2003
Nordco Inc.
David Sean Johnsen
E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES