Granted Patent
Utility
US 4,489,664 · App. 06/551,286
Closed loop fuel feed system for multiple direct fired burners
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Nov 14, 1983
Inventor
Robert M. Williams
Assignee (at issue)
WILLIAMS PATENT CRUSHER AND PULVERIZER COMPANY
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.