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发明名称
Telephone system
摘要
申请公布号
US2130482(A)
申请公布日期
1938.09.20
申请号
US19360108157
申请日期
1936.10.29
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BOWNE LANGFORD J.
分类号
H04M3/62
主分类号
H04M3/62
代理机构
代理人
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地址
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