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发明名称
Vorrichtung zur Wiedergabe von Tonfilmen.
摘要
申请公布号
AT120533(B)
申请公布日期
1930.12.27
申请号
ATD120533
申请日期
1929.03.27
申请人
"SELENOPHON" LICHT- UND TONBILDGESELLSCHAFT M. B. H.
发明人
分类号
主分类号
代理机构
代理人
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