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发明名称
Automatic telecommunication exchange system
摘要
申请公布号
US2851534(A)
申请公布日期
1958.09.09
申请号
US19520277192
申请日期
1952.03.18
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
BRAY FREDERICK HARRY;BUTLER MICHAEL ARTHUR EDGEWORTH
分类号
H03K17/68;H04Q3/42;H04Q3/52
主分类号
H03K17/68
代理机构
代理人
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地址
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