Granted Patent
Utility
US 4,716,933 · App. 06/919,533
Valve unit
Inventors:
Guy T. Stoever, David W. Swaim
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Oct 16, 1986
Inventors
Guy T. Stoever
David W. Swaim
Assignee (at issue)
J. I. Case 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.