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Application filed by Elektroingenioer Axel Carl Geo, Elektroingenioer Arnold PoulsefiledCriticalElektroingenioer Axel Carl Geo
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Publication of DK35471CpublicationCriticalpatent/DK35471C/en
DK35471D1924-11-181924-11-18
Procedure for the transmission of sound by electrical means and for the recording and reproduction of sound film.
DK35471C
(en)