Granted Patent
Utility
US 5,377,539 · App. 08/051,890
Valve stem extender with integral air pressure gauge
Inventor:
Robert K. LaSalle
Patented Case
View Patent ↗
Granted: Jan 3, 1995
Filed: Apr 26, 1993
Inventor
Robert K. LaSalle
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.