Granted Patent
Utility
US 4,535,700 · App. 06/343,331
Device for tamping railroad track adjacent the tie ends thereof
Inventor:
Helmuth von Beckmann
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Jan 27, 1982
Inventor
Helmuth von Beckmann
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.