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Expired
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Gerardus Johannes Teodo Allard
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Individual
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Individual
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Publication of GB191420923ApublicationCriticalpatent/GB191420923A/en
20,923. Allard, G. J. T. Oct. 13. Horns and trumpets, arranging and s u p p o r t i n g.-A gramophone is provided with a sound amplifier arranged in proximity to a sound board and strings as in a piano. The mouths m on the # cross-head of the horn c are adjusted in position by the screw l.
GB191420923D1914-10-131914-10-13A Device for Rendering Purer or Clearer the Sound Produced by a Gramophone.
ExpiredGB191420923A
(en)