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经营范围
发明名称
Welder's helmet
摘要
申请公布号
US2390006(A)
申请公布日期
1945.11.27
申请号
US19420446191
申请日期
1942.06.08
申请人
AMERICAN OPTICAL COMPANY
发明人
SEVERY LAWRENCE A.
分类号
A61F9/06
主分类号
A61F9/06
代理机构
代理人
主权项
地址
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