Granted Patent
Utility
US 4,423,765 · App. 06/384,017
Apparatus for reducing heater and air conditioning energy consumption
Inventor:
Paul N. Hildebrand
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Jun 1, 1982
Inventor
Paul N. Hildebrand
Assignee (at issue)
Orange Energy Systems, 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.