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发明名称
Face mask
摘要
申请公布号
US2888920(A)
申请公布日期
1959.06.02
申请号
US19570644079
申请日期
1957.03.05
申请人
OTTO HEINRICH DRAGER
发明人
MOLLERING KARL F.;TIETZE HERMANN
分类号
A62B18/02
主分类号
A62B18/02
代理机构
代理人
主权项
地址
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