Granted Patent
Utility
US 4,284,868 · App. 05/971,727
Microwave oven
Inventor:
James E. Simpson
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Dec 21, 1978
Inventor
James E. Simpson
Assignee (at issue)
Amana Refrigeration, 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.