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发明名称
Perfectionnements à l'enregistrement et à la reproduction sonores
摘要
申请公布号
FR1207415(A)
申请公布日期
1960.02.16
申请号
FRD1207415
申请日期
1957.07.10
申请人
发明人
SUGDEN ARNOLD ROBINSON
分类号
H04R1/16;H04R9/16
主分类号
H04R1/16
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代理人
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