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发明名称
Calling party identification for automatic telephone systems
摘要
申请公布号
US2524773(A)
申请公布日期
1950.10.10
申请号
US19440529506
申请日期
1944.04.04
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
DEAKIN GERALD
分类号
C07D307/50;H04Q3/42
主分类号
C07D307/50
代理机构
代理人
主权项
地址
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