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发明名称
Protecteur pour écouteurs téléphoniques
摘要
申请公布号
FR716666(A)
申请公布日期
1931.12.24
申请号
FRD716666
申请日期
1931.05.06
申请人
发明人
SABATER LUIS VILLA
分类号
H04R1/12
主分类号
H04R1/12
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代理人
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