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Current document root: Journal of the Society of Motion Picture and Television Engineers ( Volume: 57, Issue: 4, October 1951)

A System of Double Noise Reduction for Variable-Area Recording for Direct-Playback Purposes

SMPTE • Journal Article • [Active]

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  • 1. U.S. Patent 1,935,417, Lewis T. Robinson, 1933 .EXTERNAL
  • 2. U.S. Patents 2,251,665, G. L. Dimmick, 1941 ; 2,165,787, G. L. Dimmick, 1939 .EXTERNAL
  • 3. British Patent 546,332, Radio Corporation of America, 1942 .EXTERNAL