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发明名称
Safety headgear
摘要
申请公布号
US2384183(A)
申请公布日期
1945.09.04
申请号
US19430506702
申请日期
1943.10.18
申请人
E. D. BULLARD COMPANY
发明人
LUDWELL FREDERICK R.
分类号
A42B3/14
主分类号
A42B3/14
代理机构
代理人
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地址
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