Granted Patent
Utility
US 6,404,886 · App. 09/556,973
Method and apparatus for echo cancelling with multiple microphones
Inventors:
Tatsumasa Yoshida, Masashi Takada
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Apr 24, 2000
Inventors
Tatsumasa Yoshida
Masashi Takada
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.