Granted Patent
Utility
US 5,042,576 · App. 07/464,643
Louvered fin heat exchanger
Inventor:
John Allen Broadbent
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Jan 10, 1990
Inventor
John Allen Broadbent
Assignee (at issue)
HEATCRAFT, 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.