Granted Patent
Utility
US 4,521,658 · App. 06/571,157
Microwave oven scale apparatus
Inventors:
Alvin D. Wyland, Duaine W. Smith, Louis W. Blackburn
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Jan 16, 1984
Inventors
Alvin D. Wyland
Duaine W. Smith
Louis W. Blackburn
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.