Granted Patent
Utility
US 6,463,858 · App. 09/810,975
Rail tie replacement method and apparatus
Inventors:
Robert M. Weber, William D. Straub
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Mar 16, 2001
Inventors
Robert M. Weber
William D. Straub
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.