Granted Patent
Utility
US 5,133,673 · App. 07/687,058
Connecting element
Inventor:
Frank J. J. Dijkshoorn
Patented Case
View Patent ↗
Granted: Jul 28, 1992
Filed: Apr 18, 1991
Inventor
Frank J. J. Dijkshoorn
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.