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发明名称
Drafting device
摘要
申请公布号
US2242828(A)
申请公布日期
1941.05.20
申请号
US19390302944
申请日期
1939.11.06
申请人
EUGENE DIETZGEN CO.
发明人
LANGSNER ADOLPH
分类号
B43L13/06
主分类号
B43L13/06
代理机构
代理人
主权项
地址
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