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发明名称
Blackboard assembly
摘要
申请公布号
US2956350(A)
申请公布日期
1960.10.18
申请号
US19540405949
申请日期
1954.01.25
申请人
AKERS VICTOR I
发明人
AKERS VICTOR I.
分类号
A47B97/08
主分类号
A47B97/08
代理机构
代理人
主权项
地址
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