Granted Patent
Utility
US 5,988,589 · App. 08/895,456
Air valve assembly including split-shaft and seal arrangement
Inventor:
R. Jan Mowill
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jul 16, 1997
Inventor
R. Jan Mowill
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.