Granted Patent
Utility
US 5,437,263 · App. 08/113,591
High efficiency furnace method and apparatus
Inventors:
Jeffrey Ellingham, Gary W. Bonorden, Mark A. Vackar
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Aug 27, 1993
Inventors
Jeffrey Ellingham
Gary W. Bonorden
Mark A. Vackar
Assignee (at issue)
Goodman Manufacturing Company, L.P.
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.