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发明名称
BOX FOR FILING INDEX CARDS
摘要
申请公布号
CA306460(A)
申请公布日期
1930.12.09
申请号
CAD306460
申请日期
申请人
WALTHER ERICH
发明人
WALTHER ERICH
分类号
主分类号
代理机构
代理人
主权项
地址
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