Granted Patent
Utility
US 6,142,255 · App. 08/869,494
Ladder, member for connecting a rail to a horizontal element of a ladder, and method
Inventors:
David E. Plotner, Edward E. Heald, Richard P. Sulecki, Frederick J. Bartnicki, Mitchell H. Hetrich
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jun 5, 1997
Inventors
David E. Plotner
Edward E. Heald
Richard P. Sulecki
Frederick J. Bartnicki
Mitchell H. Hetrich
Assignee (at issue)
Werner 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.