Granted Patent
Utility
US 5,761,291 · App. 08/263,963
Method of assigning telephone area codes
Inventor:
Gary R. Dalton
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Jun 22, 1994
Inventor
Gary R. Dalton
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.