Granted Patent
Utility
US 6,654,448 · App. 10/127,070
Voice messaging system
Inventors:
Sanjay Agraharam, Randy G. Goldberg, Robert Edward Markowitz, Kenneth H. Rosen
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Apr 22, 2002
Inventors
Sanjay Agraharam
Randy G. Goldberg
Robert Edward Markowitz
Kenneth H. Rosen
Assignee (at issue)
AT&T 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.