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The follow up patents were developments of the first design.
They all consisted of four turntables with a centrally mounted tonearm which rotated to play each record in turn.
The reproduction was acoustic with a regular soundbox, tonearm and horn, and the mechanism was powered by an electric motor.
They were intended for use in hotels and restaurants.
From the number of survivors (only one known) it doesn’t appear that they enjoyed very much success.
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