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经营范围
发明名称
Drafting board
摘要
申请公布号
US2677185(A)
申请公布日期
1954.05.04
申请号
US19520274182
申请日期
1952.02.29
申请人
BERGER ROBERT C
发明人
BERGER ROBERT C.
分类号
B43L5/02
主分类号
B43L5/02
代理机构
代理人
主权项
地址
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