Granted Patent
Utility
US 4,250,913 · App. 06/036,664
Pilot mechanism for pressure regulating valve
Inventor:
William L. Scull
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: May 7, 1979
Inventor
William L. Scull
Assignee (at issue)
Leslie Company
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.