Granted Patent
Utility
US 5,682,947 · App. 08/646,006
Housing assembly for a coil heat exchanger
Inventor:
D. Patrick McFarlane
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: May 7, 1996
Inventor
D. Patrick McFarlane
Assignee (at issue)
Graham Holdings Company
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.