Granted Patent
Utility
US 6,574,337 · App. 09/395,568
Adaptive echo canceler undoing adaptations made during double-talk
Inventor:
Shinichi Kawada
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Sep 14, 1999
Inventor
Shinichi Kawada
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.