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经营范围
发明名称
Folding easel
摘要
申请公布号
US2160457(A)
申请公布日期
1939.05.30
申请号
US19370156496
申请日期
1937.07.30
申请人
NATIONAL CARBON COMPANY, INC.
发明人
HOUSMAN ALFRED J.;EVANS WAYNE S.
分类号
A47B97/02
主分类号
A47B97/02
代理机构
代理人
主权项
地址
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