The Variable Speech Control Company ("VSC")

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4586174 Audio channel stacking with speech compression for narrow band transmission with provision for dialed callsExpiredAug 14, 84Apr 29, 86[H04J]
4415772 Gapless splicing of pitch altered waveformsExpiredMay 11, 81Nov 15, 83[G10L]
4406001 Time compression/expansion with synchronized individual pitch correction of separate componentsExpiredAug 18, 80Sep 20, 83[H04B, G11B]

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