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Application filed by Preben Morland, Joergen Adolph SmithfiledCriticalPreben Morland
Priority to DK116140ApriorityCriticalpatent/DK65319C/da
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Publication of DK65319CpublicationCriticalpatent/DK65319C/da
Fremgangsmaade og Apparater til Omsætning af Lydsvingninger til elektriske Svingninger med et i Forhold til Lydsvingningerne indskrænket Amplitudeomraade.