Granted Patent
Utility
US 5,673,768 · App. 08/594,642
Ladder wear protection device
Inventors:
Thomas J. Schmitt, Paul R. Swiderski
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Feb 2, 1996
Inventors
Thomas J. Schmitt
Paul R. Swiderski
Assignee (at issue)
Emerson Electric Co.
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.