Granted Patent
Utility
US 6,050,650 · App. 09/112,722
Application solenoid valve for electronically controlled freight train brake system
Inventor:
James E. Hart
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Jul 9, 1998
Inventor
James E. Hart
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.