Granted Patent
Utility
US 5,817,934 · App. 08/807,795
Head of train device
Inventor:
Elmer T. Skantar
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Feb 28, 1997
Inventor
Elmer T. Skantar
Assignee (at issue)
Westinghouse Air Brake Co.
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.