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发明名称
Multifrequency signaling receiver circuit
摘要
申请公布号
US3281790(A)
申请公布日期
1966.10.25
申请号
US19630269587
申请日期
1963.04.01
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
ROSCOE LAWRENCE C. J.
分类号
H04Q1/453
主分类号
H04Q1/453
代理机构
代理人
主权项
地址
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