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经营范围
发明名称
Grading machine
摘要
申请公布号
US2352650(A)
申请公布日期
1944.07.04
申请号
US19410399088
申请日期
1941.06.21
申请人
NORTH AMERICAN HOLDING CORPORATION
发明人
METCALF ARTHUR G. B.
分类号
主分类号
代理机构
代理人
主权项
地址
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