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经营范围
发明名称
Welder's mask or helmet
摘要
申请公布号
US2343864(A)
申请公布日期
1944.03.14
申请号
US19420436341
申请日期
1942.03.26
申请人
UNIT RAYS, INC.
发明人
HEBELER EDWARD S.
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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