Granted Patent
Utility
US 6,480,821 · App. 09/774,840
Methods and apparatus for reducing noise associated with an electrical speech signal
Inventors:
Dusan Macho, Yan Cheng
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jan 31, 2001
Inventors
Dusan Macho
Yan Cheng
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.