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经营范围
发明名称
Drafting instrument
摘要
申请公布号
US2674803(A)
申请公布日期
1954.04.13
申请号
US19510234036
申请日期
1951.06.28
申请人
MATTHES ELMER F
发明人
MATTHES ELMER F.
分类号
B43L13/20
主分类号
B43L13/20
代理机构
代理人
主权项
地址
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