Granted Patent
Utility
US 4,807,584 · App. 07/120,185
Fuel tank heating system
Inventor:
Leland L. Davis
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Nov 9, 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.