Granted Patent
Utility
US 4,883,943 · App. 07/133,801
Electric heater for fuel tank discharge opening coupling to prevent fuel waxing
Inventor:
Leland L. Davis
Patented Case
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Granted: Nov 28, 1989
Filed: Dec 16, 1987
Inventor
Leland L. Davis
Assignee (at issue)
Davco Manufacturing 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.