Granted Patent
Utility
US 6,555,793 · App. 09/189,564
Advanced radiant electric heater
Inventors:
Simon P. Griffiths, Herbert G. Ray
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Nov 11, 1998
Inventors
Simon P. Griffiths
Herbert G. Ray
Assignee (at issue)
Emerson Electric Co.
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.