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发明名称
Signaling system
摘要
申请公布号
US2340366(A)
申请公布日期
1944.02.01
申请号
US19420440335
申请日期
1942.04.24
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CESAREO ORFEO
分类号
H04Q1/32
主分类号
H04Q1/32
代理机构
代理人
主权项
地址
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