Granted Patent
Utility
US 4,248,403 · App. 06/001,963
Plug assembly for movable plug valves
Inventor:
William L. Scull
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jan 8, 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.