Granted Patent
Utility
US 4,378,950 · App. 06/217,969
Inshot valve arrangement for railway brake control apparatus employing combined air reservoir/brake cylinder device
Inventors:
James E. Hart, Robert J. Zahradnik
Patented Case
View Patent ↗
Granted: Apr 5, 1983
Filed: Dec 19, 1980
Inventors
James E. Hart
Robert J. Zahradnik
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.