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发明名称
Appareil haut-parleur combinable avec des installations téléphoniques
摘要
申请公布号
FR780922(A)
申请公布日期
1935.05.06
申请号
FRD780922
申请日期
1934.11.07
申请人
发明人
HIXON SAMUEL SEYMOUR
分类号
H04M1/60
主分类号
H04M1/60
代理机构
代理人
主权项
地址
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