Granted Patent
Utility
US 6,393,124 · App. 08/964,573
CPE alert signal tone detector
Inventors:
Chieh-Wen Tsai, David Wong
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Nov 5, 1997
Inventors
Chieh-Wen Tsai
David Wong
Assignee (at issue)
Virata 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.