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发明名称
Verfahren zum Aufzeichnen von elektrischen Modulationen, insbesondere für die Zwecke der Tonaufzeichnung.
摘要
申请公布号
AT144829(B)
申请公布日期
1936.03.10
申请号
ATD144829
申请日期
1934.01.02
申请人
TOBIS TONBILD-SYNDIKAT AKTIENGESELLSCHAFT
发明人
DIPL. ING. BERTHOLD FREUND
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