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发明名称
Selecting system
摘要
申请公布号
US2582349(A)
申请公布日期
1952.01.15
申请号
US19480022426
申请日期
1948.04.21
申请人
MARIE OBERMAN ROELOF MAARTEN
发明人
OBERMAN ROELOF MAARTEN MARIE
分类号
H04Q1/18
主分类号
H04Q1/18
代理机构
代理人
主权项
地址
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