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发明名称
Dispositif téléphonique
摘要
申请公布号
FR938800(A)
申请公布日期
1948.10.25
申请号
FRD938800
申请日期
1946.11.18
申请人
AUTOMATIC ELECTRIC LABORATORIES INC.
发明人
分类号
H04Q3/62
主分类号
H04Q3/62
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代理人
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