Granted Patent
Utility
US 4,339,155 · App. 06/195,149
Control valve arrangement for combined brake and air reservoir device
Inventor:
James E. Hart
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Oct 8, 1980
Inventor
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.