Granted Patent
Utility
US 4,197,959 · App. 05/915,400
Covers for electrical receptacles
Inventor:
David E. Kramer
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: Jun 14, 1978
Inventor
David E. Kramer
Assignee (at issue)
Daniel Woodhead, Inc.
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.