Granted Patent
Utility
US 6,061,439 · App. 08/826,171
Method and apparatus for providing subscriber services to a telephone
Inventors:
Leonard George Bleile, Anthony Smith
Patented Case
View Patent ↗
Granted: May 9, 2000
Filed: Mar 27, 1997
Inventors
Leonard George Bleile
Anthony Smith
Assignee (at issue)
Nortel Networks Limited
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.