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发明名称
Beam compass
摘要
申请公布号
US2516735(A)
申请公布日期
1950.07.25
申请号
US19470726822
申请日期
1947.02.06
申请人
KEUFFEL & ESSER COMPANY
发明人
VIRUS HUGO
分类号
A47G19/34;B43L9/04
主分类号
A47G19/34
代理机构
代理人
主权项
地址
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