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经营范围
发明名称
Improvements in or relating to sound records
摘要
申请公布号
GB422543(A)
申请公布日期
1935.01.08
申请号
GB19330010538
申请日期
1933.04.08
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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地址
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