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经营范围
发明名称
Air filtering device
摘要
申请公布号
US2890762(A)
申请公布日期
1959.06.16
申请号
US19570636979
申请日期
1957.01.29
申请人
MINE SAFETY APPLIANCES COMPANY
发明人
LINDSAY DAVID
分类号
A62B23/02;B01D46/42
主分类号
A62B23/02
代理机构
代理人
主权项
地址
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