Granted Patent
Utility
US 6,643,355 · App. 10/227,752
Automated parallel and redundant subscriber contact and event notification system
Inventor:
William J. Tsumpes
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Aug 26, 2002
Inventor
William J. Tsumpes
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.