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发明名称
Drafting instrument
摘要
申请公布号
US2222407(A)
申请公布日期
1940.11.19
申请号
US19400333270
申请日期
1940.05.04
申请人
CHARLES GOBEL
发明人
GOBEL CHARLES
分类号
B43L13/22
主分类号
B43L13/22
代理机构
代理人
主权项
地址
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