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发明名称
Sound record band with a plurality of records
摘要
申请公布号
US1880240(A)
申请公布日期
1932.10.04
申请号
US19300497279
申请日期
1930.11.21
申请人
SELENOPHON LICHT UND TONBILD-GESELLSCHAFT M. B. H.
发明人
CZEIJA OSKAR;THIRRING HANS
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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