The Variable Speech Control (VSC)

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Records under this name other than patents The Variable Speech Control (VSC) holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

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Patent	Title	Status	Expires	Confidence
US 4,406,001	Time compression/expansion with synchronized individual pitch correction of separate components Term ended Term ended no later than Sep 20, 2003 · Low confidence	Term ended	Term ended no later than Sep 20, 2003	Low confidence
US 4,415,772	Gapless splicing of pitch altered waveforms Term ended Term ended no later than Nov 15, 2003 · Low confidence	Term ended	Term ended no later than Nov 15, 2003	Low confidence
US 4,417,103	Stereo reproduction with gapless splicing of pitch altered waveforms Term ended Term ended no later than Nov 22, 2003 · Low confidence	Term ended	Term ended no later than Nov 22, 2003	Low confidence
US 4,586,174	Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls Term ended Term ended no later than Apr 29, 2006 · Low confidence	Term ended	Term ended no later than Apr 29, 2006	Low confidence
US 4,700,391	Method and apparatus for pitch controlled voice signal processing Term ended Term ended no later than Oct 13, 2007 · Low confidence	Term ended	Term ended no later than Oct 13, 2007	Low confidence
US 4,792,975	Digital speech signal processing for pitch change with jump control in accordance with pitch period Term ended Term ended no later than Dec 20, 2008 · Low confidence	Term ended	Term ended no later than Dec 20, 2008	Low confidence