Granted Patent
Utility
US 4,568,134 · App. 06/703,656
Printed circuit board keying system
Inventor:
Vincent D. DiMondi
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Feb 21, 1985
Inventor
Vincent D. DiMondi
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.