Granted Patent
Utility
US 4,406,509 · App. 06/325,024
Jack and plug electrical assembly
Inventor:
Paul R. Jagen
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: Nov 25, 1981
Inventor
Paul R. Jagen
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.