Granted Patent
Utility
US 5,560,503 · App. 08/545,930
Lubricating apparatus for articulated coupling arrangement
Inventor:
David W. Daugherty, Jr.
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Oct 20, 1995
Inventor
David W. Daugherty, Jr.
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.