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经营范围
发明名称
Protective helmet
摘要
申请公布号
US2239946(A)
申请公布日期
1941.04.29
申请号
US19390310971
申请日期
1939.12.26
申请人
UPCHURCH JR THOMAS B
发明人
JR. THOMAS B. UPCHURCH,
分类号
A42B3/04;A42B3/06;A42B3/12;A42B3/28
主分类号
A42B3/04
代理机构
代理人
主权项
地址
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