Granted Patent
Utility
US 5,459,779 · App. 08/201,867
Method for switching telephone calls to information service providers
Inventors:
Marjorie S. Backaus, John J. Butz, Ali M. Cherchali, Esther L. Davenport, Harold Fahrer, Kathleen A. Misdea, Robert Petrelli
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Feb 25, 1994
Inventors
Marjorie S. Backaus
John J. Butz
Ali M. Cherchali
Esther L. Davenport
Harold Fahrer
Kathleen A. Misdea
Robert Petrelli
Assignee (at issue)
AT & T IPM Corp.
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.