Granted Patent
Utility
US 5,810,074 · App. 08/710,235
Serial heat exchanger and cascade circuitry
Inventor:
Stephen S. Hancock
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Sep 13, 1996
Inventor
Stephen S. Hancock
Assignee (at issue)
American Standard 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.