Granted Patent
Utility
US 6,622,633 · App. 10/113,360
Railroad machine centering system
Inventors:
David Johnsen, William D. Straub, Bruce M. Boczkiewicz
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Mar 29, 2002
Inventors
David Johnsen
William D. Straub
Bruce M. Boczkiewicz
Assignee (at issue)
Nordco Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.