Granted Patent
Utility
US 5,640,153 · App. 08/679,157
Energy utilization controller and control system and method
Inventors:
Paul N. Hildebrand, T. Frank Knight, Kelley A. Lawrence, Carlton R. Hildebrand
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jul 12, 1996
Inventors
Paul N. Hildebrand
T. Frank Knight
Kelley A. Lawrence
Carlton R. Hildebrand
Assignee (at issue)
Excel Energy Technologies, 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.