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发明名称
Telephone system
摘要
申请公布号
US2040291(A)
申请公布日期
1936.05.12
申请号
US19320644235
申请日期
1932.11.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BONOMI FELIX A.
分类号
H04M3/58
主分类号
H04M3/58
代理机构
代理人
主权项
地址
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