Granted Patent
Utility
US 5,217,047 · App. 07/708,392
Solenoid operated pressure regulating valve
Inventor:
Ralph P. McCabe
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: May 30, 1991
Inventor
Ralph P. McCabe
Assignee (at issue)
COLTEC INDUSTRIES, 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.