Granted Patent
Utility
US 4,986,500 · App. 07/354,942
Adjustable air brake hose support for railway vehicles
Inventor:
Ernest Campbell
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: May 22, 1989
Inventor
Ernest Campbell
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.