Granted Patent
Utility
US 4,355,973 · App. 06/277,747
Radiant heating apparatus
Inventor:
John M. Bailey
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Feb 17, 1981
Inventor
John M. Bailey
Assignee (at issue)
Caterpillar Tractor Co.
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.