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经营范围
发明名称
Multiplex electrical signaling and control
摘要
申请公布号
US1885010(A)
申请公布日期
1932.10.25
申请号
US19230653450
申请日期
1923.07.24
申请人
TUYL DAY ALBERT VAN
发明人
DAY ALBERT VAN TUYL
分类号
H04J9/00
主分类号
H04J9/00
代理机构
代理人
主权项
地址
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