Granted Patent
Utility
US 4,190,756 · App. 05/872,531
Digitally programmed microwave cooker
Inventor:
Richard A. Foerstner
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Jan 26, 1978
Inventor
Richard A. Foerstner
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.