Granted Patent
Utility
US 4,323,861 · App. 06/025,217
Oscillator circuit for controlling the power level of a microwave oven
Inventors:
Louis M. Sandler, Walter R. Spofford, Charles E. Scott
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Mar 29, 1979
Inventors
Louis M. Sandler
Walter R. Spofford
Charles E. Scott
Assignee (at issue)
Emhart Industries, 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.