Granted Patent
Utility
US 5,123,482 · App. 07/791,889
Oval tube heat exchanger
Inventor:
Anthony W. Abraham
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Nov 14, 1991
Inventor
Anthony W. Abraham
Assignee (at issue)
Wynns Climate Systems, 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.