Granted Patent
Utility
US 6,694,004 · App. 09/749,824
System and method for simultaneous ring service with centralized subscription data
Inventors:
Joseph Knoerle, Hong Thi Nguyen, Zeeman Zhang, Michael Griffiths
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Dec 28, 2000
Inventors
Joseph Knoerle
Hong Thi Nguyen
Zeeman Zhang
Michael Griffiths
Assignee (at issue)
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION
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.