Granted Patent
Utility
US 6,721,673 · App. 10/037,620
Estimating a plurality of tones in an input signal
Inventor:
Yong Rao
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Jan 3, 2002
Inventor
Yong Rao
Assignee (at issue)
National Instruments 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.