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发明名称
Chalkboard mounting apparatus
摘要
申请公布号
US3290131(A)
申请公布日期
1966.12.06
申请号
US19640410986
申请日期
1964.11.13
申请人
W. E. NEAL SLATE CO.
发明人
JR. WALLACE E. NEAL,
分类号
A47B97/00
主分类号
A47B97/00
代理机构
代理人
主权项
地址
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