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Elmer Gates 1904 Synopsis of Inventions Acoustics and music: an electromagnetic method of producing fundamental tones without their harmonics, and by which the number and harmonic relation of overtones can be regulated i
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Document Date: 2006-12-20 04:33:19


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telephone dynamo / protective devices / electricity / Non-electrolytic device / metal working / automatic devices / regulated training devices / gas storage battery / /

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Elmer Gates / /

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suction sweeper / /

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