Granted Patent
Utility
US 5,883,883 · App. 08/731,791
Apparatus and method for testing the administration of network based supplementary services
Inventors:
Albert D. Baker, Charles Lewis Davidson, Ellen Eng
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Oct 18, 1996
Inventors
Albert D. Baker
Charles Lewis Davidson
Ellen Eng
Assignee (at issue)
LUCENT TECHNOLOGIES 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.