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经营范围
发明名称
Perfectionnements aux systèmes électroacoustiques
摘要
申请公布号
FR953245(A)
申请公布日期
1949.12.02
申请号
FRD953245
申请日期
1947.09.19
申请人
GUIDED RADIO CORPORATION
发明人
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
地址
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