Granted Patent
Utility
US 4,944,670 · App. 07/451,784
Self-cleaning burner
Inventor:
James E. Watson
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Dec 15, 1989
Inventor
James E. Watson
Assignee (at issue)
North American 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.