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发明名称
Device for holding printed matter
摘要
申请公布号
US1752614(A)
申请公布日期
1930.04.01
申请号
US19270239482
申请日期
1927.12.12
申请人
ANSGAR RING ARTHUR
发明人
RING ARTHUR ANSGAR
分类号
G09F11/29
主分类号
G09F11/29
代理机构
代理人
主权项
地址
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