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发明名称
Signaling circuitry coupling telephone central office and remote switching unit
摘要
申请公布号
US3217108(A)
申请公布日期
1965.11.09
申请号
US19610162167
申请日期
1961.12.26
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
JACOBY JOHN Z.
分类号
H04Q3/54
主分类号
H04Q3/54
代理机构
代理人
主权项
地址
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