Granted Patent
Utility
US 5,259,480 · App. 07/906,587
Ladder top
Inventors:
Frederick J. Bartnicki, Harold L. Bernard, Robert D. Beggs, Donald M. Werner
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Jun 30, 1992
Inventors
Frederick J. Bartnicki
Harold L. Bernard
Robert D. Beggs
Donald M. Werner
Assignee (at issue)
R. D. Werner Co., 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.