Granted Patent
Utility
US 4,320,739 · App. 06/042,559
Combustion type heater
Inventor:
Murray O. Wilhoite
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: May 25, 1979
Inventor
Murray O. Wilhoite
Assignee (at issue)
Martin Industries, Inc.
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.