Granted Patent
Utility
US 6,765,971 · App. 09/634,092
System method and computer program product for improved narrow band signal detection for echo cancellation
Inventor:
Liming Qin
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Aug 8, 2000
Inventor
Liming Qin
Assignee (at issue)
HUGHES ELECTRONICS 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.