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经营范围
发明名称
Electronic telephone system
摘要
申请公布号
GB841836(A)
申请公布日期
1960.07.20
申请号
GB19560032992
申请日期
1956.10.29
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
分类号
H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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