Granted Patent
Utility
US 6,078,657 · App. 08/866,914
Method and system for providing local telephone number portability using geographic unit building blocks
Inventors:
James Alfieri, William Henry Krall, III
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: May 30, 1997
Inventors
James Alfieri
William Henry Krall, III
Assignee (at issue)
Telcordia 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.