Granted Patent
Utility
US 4,487,571 · App. 06/443,441
Oil combustion system
Inventors:
Wayne Robertson, Eugene C. Briggs, Keith E. Briggs
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Nov 22, 1982
Inventors
Wayne Robertson
Eugene C. Briggs
Keith E. Briggs
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.