Granted Patent
Utility
US 6,701,721 · App. 10/356,135
Stirling engine driven heat pump with fluid interconnection
Inventor:
David M. Berchowitz
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Feb 1, 2003
Inventor
David M. Berchowitz
Assignee (at issue)
Global Cooling, 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.