Granted Patent
Utility
US 4,722,387 · App. 06/830,316
Heat exchanger and method of assembly
Inventor:
Gene W. Aurand
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Feb 18, 1986
Inventor
Gene W. Aurand
Assignee (at issue)
Garrett Corporation
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.