Granted Patent
Utility
US 5,558,238 · App. 08/526,436
Freight railway car slackless drawbar assembly
Inventor:
David W. Daugherty, Jr.
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Sep 11, 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.