Granted Patent
Utility
US 5,864,602 · App. 08/848,150
Qualifying telephone line for digital transmission service
Inventor:
Jack Needle
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Apr 28, 1997
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.