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发明名称
Protective headgear
摘要
申请公布号
US2123275(A)
申请公布日期
1938.07.12
申请号
US19360082765
申请日期
1936.06.01
申请人
MINE SAFETY APPLIANCES COMPANY
发明人
DYM JOSEPH B.
分类号
A42B3/06
主分类号
A42B3/06
代理机构
代理人
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地址
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