Granted Patent
Utility
US 4,297,557 · App. 05/682,198
Microwave oven temperature indicator and control means
Inventors:
Hugh J. Tyler, William H. Conway
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: May 3, 1976
Inventors
Hugh J. Tyler
William H. Conway
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.