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发明名称
DEVICES FOR SELECTING METAL PIECES
摘要
申请公布号
CA470173(A)
申请公布日期
1950.12.19
申请号
CAD470173
申请日期
申请人
ALLEN B. DU MONT LABORATORIES
发明人
ESTLE RAY MANN;THOMAS TOLIVER GOLDSMITH, JR.
分类号
主分类号
代理机构
代理人
主权项
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