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发明名称
Electrical signaling system
摘要
申请公布号
US2428028(A)
申请公布日期
1947.09.30
申请号
US19430478700
申请日期
1943.03.10
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
JOLY LEON;ANDRES LOUIS CHARLES
分类号
H04M11/04
主分类号
H04M11/04
代理机构
代理人
主权项
地址
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