Granted Patent
Utility
US 5,340,203 · App. 08/074,526
Variable load control valve with dual diaphragms reinforced by washers and spacer members
Inventor:
Padmanab L. Gowda
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Jun 11, 1993
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.