Granted Patent
Utility
US 4,783,124 · App. 07/116,941
Freight brake control valve device having improved quick service function
Inventors:
Edward W. Gaughan, Theodore B. Hill
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: Nov 5, 1987
Inventors
Edward W. Gaughan
Theodore B. Hill
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.