Granted Patent
Utility
US 5,729,593 · App. 08/689,472
Annoucement system and method in a telephone call switching system
Inventors:
Daniel F. Baker, Noreen A. Harrington, Paul E. Van Berkum
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Aug 8, 1996
Inventors
Daniel F. Baker
Noreen A. Harrington
Paul E. Van Berkum
Assignee (at issue)
Rockwell International 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.