Granted Patent
Utility
US 4,077,617 · App. 05/692,597
Vehicle leveling valve device with dampening arrangement
Inventor:
Raymond Wright
Patented Case
View Patent ↗
Granted: Mar 7, 1978
Filed: Jun 3, 1976
Inventor
Raymond Wright
Assignee (at issue)
Westinghouse Air Brake Co.
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.