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发明名称
Dispositif protecteur hygiénique pour appareil récepteur téléphonique
摘要
申请公布号
FR832422(A)
申请公布日期
1938.09.27
申请号
FRD832422
申请日期
1937.05.04
申请人
发明人
MEHL MARIE, NICOLAS, ADOLPHE
分类号
H04R1/12
主分类号
H04R1/12
代理机构
代理人
主权项
地址
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