Granted Patent
Utility
US 4,274,334 · App. 05/951,133
Machine for changing rails
Inventor:
Raymond R. Lund
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Oct 13, 1978
Inventor
Raymond R. Lund
Assignee (at issue)
Canron Corporation
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.