Granted Patent
Utility
US 4,616,209 · App. 06/495,895
"""Keep warm"" control"
Inventor:
Joseph J. Mahon
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: May 18, 1983
Inventor
Joseph J. Mahon
Assignee (at issue)
Eaton Corporation
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.