Granted Patent
Utility
US 6,137,868 · App. 09/105,287
Outage notification device
Inventor:
Mark Leach
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Jun 25, 1998
Inventor
Mark Leach
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.