Granted Patent
Utility
US 5,141,293 · App. 07/579,750
Hydraulic isolation valve for railway vehicle
Inventor:
Padmanab L. Gowda
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Sep 10, 1990
Inventor
Padmanab L. Gowda
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.