Granted Patent
Utility
US 4,937,413 · App. 07/395,020
Acoustic sensor assembly for a microwave oven
Inventors:
Fred T. Spruytenburg, Charles W. McDonald, Michael J. Hodgetts
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Aug 17, 1989
Inventors
Fred T. Spruytenburg
Charles W. McDonald
Michael J. Hodgetts
Assignee (at issue)
Microwave Products of America, 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.