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发明名称
Party line connector circuit for code ringing
摘要
申请公布号
US2583782(A)
申请公布日期
1952.01.29
申请号
US19480003424
申请日期
1948.01.21
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
LOMAX CLARENCE E.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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