Granted Patent
Utility
US 6,388,564 · App. 09/740,796
Power distribution grid communication system
Inventors:
Raymond Piercy, John Cecil Kuurstra, Andrew A. Cullen, III
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Dec 21, 2000
Inventors
Raymond Piercy
John Cecil Kuurstra
Andrew A. Cullen, III
Assignee (at issue)
Digital Security Controls Ltd.
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.