Granted Patent
Utility
US 5,946,927 · App. 09/059,878
Heat pump water heater and storage tank assembly
Inventors:
John T. Dieckmann, Brian J. Nowicki, W. Peter Teagan, Robert A. Zogg
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Apr 14, 1998
Inventors
John T. Dieckmann
Brian J. Nowicki
W. Peter Teagan
Robert A. Zogg
Assignee (at issue)
Arthur D. Little, 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.