Granted Patent
Utility
US 5,791,439 · App. 08/426,194
Ladder, member for connecting a rail to a horizontal element of a ladder, and method, and apparatus and method for holding a washer
Inventors:
David E. Plotner, Edward E. Heald, Kevin McIntire, Richard P. Sulecki, Mitchell H. Hetrich, Frederick J. Bartnicki
Patented Case
View Patent ↗
Granted: Aug 11, 1998
Filed: Apr 21, 1995
Inventors
David E. Plotner
Edward E. Heald
Kevin McIntire
Richard P. Sulecki
Mitchell H. Hetrich
Frederick J. Bartnicki
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.