Granted Patent
Utility
US 6,768,796 · App. 09/777,115
System and method for echo cancellation
Inventor:
Youhong Lu
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Feb 5, 2001
Inventor
Youhong Lu
Assignee (at issue)
3Com Corporation
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.