Granted Patent
Utility
US 6,364,007 · App. 09/665,462
Plastic counterflow heat exchanger
Inventor:
Richard L. Fischer
Patented Case
View Patent ↗
Granted: Apr 2, 2002
Filed: Sep 19, 2000
Inventor
Richard L. Fischer
Assignee (at issue)
Marconi Communications GmbH
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.