Granted Patent
Utility
US 6,157,292 · App. 09/085,446
Power distribution grid communication system
Inventors:
Raymond Piercy, John Cecil Kuurstra, Andrew A. Cullen, III
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: May 28, 1998
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.