Granted Patent
Utility
US 5,978,449 · App. 09/217,639
Qualifying telephone line for digital transmission service
Inventor:
Jack Needle
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Dec 21, 1998
Inventor
Jack Needle
Assignee (at issue)
Nynex Science & 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.