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U.S. Patent 836,531 "Means for receiving intelligence communicated by electric waves", 1906. G. W. Pickard.

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current03:13, 11 May 2007935×876 (15 KB)Reddi (Talk | contribs) (U.S. Patent 836,531 "Means for receiving intelligence communicated by electric waves", 1906. G. W. Pickard.)

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