Granted Patent
Utility
US 5,980,289 · App. 08/803,261
Hose coupling with electrical contacts
Inventor:
Thomas H. Engle
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Feb 20, 1997
Inventor
Thomas H. Engle
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.