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发明名称
Dispositif pour l'enregistrement électro-magnétique du son suivant le procédé poulsen
摘要
申请公布号
FR787440(A)
申请公布日期
1935.09.23
申请号
FRD787440
申请日期
1935.03.15
申请人
C. LORENZ AKTIENGESELLSCHAFT
发明人
分类号
H04M1/64
主分类号
H04M1/64
代理机构
代理人
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地址
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