Granted Patent
Utility
US 6,138,023 · App. 08/935,940
Method for porting a directory number from one wireless service provider to another
Inventors:
Anjana Agarwal, Douglas Rollender, Virarghavan Sudarsan
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Sep 23, 1997
Inventors
Anjana Agarwal
Douglas Rollender
Virarghavan Sudarsan
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.