Granted Patent
Utility
US 4,556,772 · App. 06/731,215
Microwave oven cavity air flow system
Inventors:
Patrick McCammon, Louis W. Blackburn, Bernard J. Hershberger
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: May 7, 1985
Inventors
Patrick McCammon
Louis W. Blackburn
Bernard J. Hershberger
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.