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发明名称
Telephone system
摘要
申请公布号
US1868326(A)
申请公布日期
1932.07.19
申请号
US19300417840
申请日期
1930.01.01
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KING GERALD V.
分类号
H04M3/60
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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