Granted Patent
Utility
US 6,405,041 · App. 08/669,805
Concurrent ringing on multiple network telephones
Inventors:
Sandip Mukerjee, Louis Michael Taff, Richard Zaffino
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Jun 27, 1996
Inventors
Sandip Mukerjee
Louis Michael Taff
Richard Zaffino
Assignee (at issue)
AT&T WIRELESS SERVICES, 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.