Granted Patent
Utility
US 5,065,736 · App. 07/649,429
Air heating apparatus and method of heating an air stream
Inventor:
Paul A. Mutchler
Patented Case
View Patent ↗
Granted: Nov 19, 1991
Filed: Feb 1, 1991
Inventor
Paul A. Mutchler
Assignee (at issue)
Engineered Air Systems
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.