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发明名称
Party line identification dial
摘要
申请公布号
GB693137(A)
申请公布日期
1953.06.24
申请号
GB19510006523
申请日期
1951.03.19
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
分类号
H04M1/54;H04M9/00;H04M15/36;H04Q5/02
主分类号
H04M1/54
代理机构
代理人
主权项
地址
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