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经营范围
发明名称
Visible index device
摘要
申请公布号
US1916398(A)
申请公布日期
1933.07.04
申请号
US19320595465
申请日期
1932.02.27
申请人
WILSON-JONES COMPANY
发明人
UNGER PAUL O.
分类号
B42F17/18
主分类号
B42F17/18
代理机构
代理人
主权项
地址
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