Granted Patent
Utility
US 5,503,469 · App. 08/380,804
Apparatus to prevent inadvertent discharge and trapping of pipe pressure in an electro-pneumatic locomotive brake control system
Inventor:
Brian L. Cunkelman
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jan 30, 1995
Inventor
Brian L. Cunkelman
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.