Granted Patent
Utility
US 6,266,404 · App. 09/001,510
Method and apparatus for controlling characteristics of distributed telephone sets from a central telephone switch
Inventors:
Bae-Sik Chon, Trang A. NGO
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Dec 31, 1997
Inventors
Bae-Sik Chon
Trang A. NGO
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.