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发明名称
Improvements in indicating devices for electro-magnetic talking machines
摘要
申请公布号
GB360725(A)
申请公布日期
1931.11.12
申请号
GB19300038396
申请日期
1930.12.19
申请人
TELEGRAPHIE-PATENT-SYNDIKAT G.M.B.H.
发明人
分类号
G11B27/13;G11B27/34
主分类号
G11B27/13
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代理人
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