Granted Patent
Utility
US 4,742,844 · App. 07/107,560
Flow control valve
Inventor:
Emil Szlaga
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Oct 13, 1987
Inventor
Emil Szlaga
Assignee (at issue)
Stant Corporation
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.