Granted Patent
Utility
US 5,279,387 · App. 07/765,369
Articulated ladder assembly
Inventors:
Paul R. Swiderski, Paul J. Seadler
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Sep 25, 1991
Inventors
Paul R. Swiderski
Paul J. Seadler
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.