Granted Patent
Utility
US 6,515,249 · App. 09/675,350
Method of railroad rail repair
Inventors:
Greg A. Valley, Mark E. Rovnyak
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Sep 29, 2000
Inventors
Greg A. Valley
Mark E. Rovnyak
Assignees (at issue)
HARSCO TECHNOLOGIES LLC
Holland, L.P.
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.