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发明名称
Telecommunication system
摘要
申请公布号
US1984099(A)
申请公布日期
1934.12.11
申请号
US19310572368
申请日期
1931.10.31
申请人
LIGNES TELEGRAPHIQUES ET TELEPHONIQUES
发明人
VIARD GEORGE
分类号
H04M11/06
主分类号
H04M11/06
代理机构
代理人
主权项
地址
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