Granted Patent
Utility
US 4,475,588 · App. 06/306,242
Heat exchanger with tubes fixed at baffles
Inventor:
John L. Tsou
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Sep 28, 1981
Inventor
John L. Tsou
Assignee (at issue)
McQuay, 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.