Granted Patent
Utility
US 5,828,742 · App. 08/691,642
Caller discrimination within a telephone system
Inventors:
Zafar M. Khalid, William J. Beyda, Jay Thomas
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: Aug 2, 1996
Inventors
Zafar M. Khalid
William J. Beyda
Jay Thomas
Assignee (at issue)
Siemens Business Communication Systems, 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.