Granted Patent
Utility
US 5,899,081 · App. 08/829,243
Heating and cooling unit using power inverter with battery
Inventors:
David Evans, Ernest Eugene Williams
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Mar 31, 1997
Inventors
David Evans
Ernest Eugene Williams
Assignee (at issue)
White Consolidated Industries, 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.