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经营范围
发明名称
Protective mask
摘要
申请公布号
US2818859(A)
申请公布日期
1958.01.07
申请号
US19560615876
申请日期
1956.10.15
申请人
PETERSON RAYFORD W
发明人
PETERSON RAYFORD W.
分类号
A62B18/00
主分类号
A62B18/00
代理机构
代理人
主权项
地址
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