Granted Patent
Utility
US 4,754,479 · App. 06/908,483
Station number portability
Inventors:
Rainie M. Bicknell, Frank J. Bogart, Henry C. Dittmer
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Sep 17, 1986
Inventors
Rainie M. Bicknell
Frank J. Bogart
Henry C. Dittmer
Assignees (at issue)
American Telephone and Telegraph, Co.
AT&T Information 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.