Granted Patent
Utility
US 4,770,472 · App. 07/027,591
Freight brake control valve having an emergency piston slide valve arranged to provide an accelerated brake application function
Inventors:
Charles Weber, James E. Hart
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Mar 18, 1987
Inventors
Charles Weber
James E. Hart
Assignee (at issue)
American Standard Inc.
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.