Granted Patent
Utility
US 6,640,208 · App. 09/659,318
Voiced/unvoiced speech classifier
Inventors:
Yaxin Zhang, Jianming Song, Anton Madievski
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Sep 12, 2000
Inventors
Yaxin Zhang
Jianming Song
Anton Madievski
Assignee (at issue)
Motorola, Inc.
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.