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发明名称
Telephone systems
摘要
申请公布号
US2764637(A)
申请公布日期
1956.09.25
申请号
US19520313029
申请日期
1952.10.03
申请人
MODERN TELEPHONES (GREAT BRITAIN) LIMITED
发明人
ADLER ADOLF ERWIN
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
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地址
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