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Individual
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Individual
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Priority to ES47297ApriorityCriticalpatent/ES47297A1/en
Publication of ES47297A1publicationCriticalpatent/ES47297A1/en
ES47297A1910-02-041910-02-04
A method and arrangement for the production of energy oscillations of any form, especially for sound oscillations.
ExpiredES47297A1
(en)