Granted Patent
Utility
US 4,643,100 · App. 06/748,608
Railway train set for the renewal of railway tracks, with support and advancement guide means
Inventor:
Enrico Valditerra
Patented Case
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Granted: Feb 17, 1987
Filed: Jun 25, 1985
Inventor
Enrico Valditerra
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.