Granted Patent
Utility
US 4,867,068 · App. 06/748,612
Railway train set for the renewal of railway tracks
Inventor:
Enrico Valditerra
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jun 25, 1985
Inventor
Enrico Valditerra
Assignee (at issue)
Valditerra S.p.A.
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.