Granted Patent
Utility
US 4,982,721 · App. 07/477,743
Restricted intake compensation method for a two stage furnace
Inventor:
Gregory A. Lynch
Patented Case
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Granted: Jan 8, 1991
Filed: Feb 9, 1990
Inventor
Gregory A. Lynch
Assignee (at issue)
Inter-City Products Corporation (USA)
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.