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经营范围
发明名称
Welder's helmet
摘要
申请公布号
US2433164(A)
申请公布日期
1947.12.23
申请号
US19450598963
申请日期
1945.06.12
申请人
SHIELDS RALEIGH T
发明人
SHIELDS RALEIGH T.
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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