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发明名称
Respirator
摘要
申请公布号
US2199230(A)
申请公布日期
1940.04.30
申请号
US19370124851
申请日期
1937.02.09
申请人
HYGEIA FILTERING CORPORATION
发明人
SCHWARTZ NATHAN
分类号
A62B18/02;A62B23/02
主分类号
A62B18/02
代理机构
代理人
主权项
地址
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