Granted Patent
Utility
US 4,790,773 · App. 07/043,821
Electrical receptacle
Inventor:
Marlyn E. Hahn
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Apr 29, 1987
Inventor
Marlyn E. Hahn
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.