Granted Patent
Utility
US 5,889,774 · App. 08/818,828
Method and apparatus for selecting an internet/PSTN changeover server for a packet based phone call
Inventors:
Mojtaba Mirashrafi, John D. Elliott, Michael F. Buondonno, Kenneth L. Keeler, Keith A. Pirkl, Al J. Simon, George L. Taylor, Mark D. Zuber
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Mar 14, 1997
Inventors
Mojtaba Mirashrafi
John D. Elliott
Michael F. Buondonno
Kenneth L. Keeler
Keith A. Pirkl
Al J. Simon
George L. Taylor
Mark D. Zuber
Assignee (at issue)
eFusion, Inc.
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.