Granted Patent
Utility
US 5,660,589 · App. 08/578,744
Lubricant retaining valve for universal joint
Inventor:
Johnny N. Smith
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Dec 26, 1995
Inventor
Johnny N. Smith
Assignee (at issue)
DANA LIMITED
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.