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发明名称
Electrical signaling system
摘要
申请公布号
US2610255(A)
申请公布日期
1952.09.09
申请号
US19470731136
申请日期
1947.02.26
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
HERTOG MARTINUS DEN;KRUITHOF JAKOB
分类号
H04Q1/453;H04Q3/00
主分类号
H04Q1/453
代理机构
代理人
主权项
地址
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