Granted Patent
Utility
US 4,347,993 · App. 06/091,738
Tension monitor means and system
Inventor:
Michael R. Leonard
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Nov 6, 1979
Inventor
Michael R. Leonard
Assignee (at issue)
W. J. Industries, Inc.
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.