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发明名称
Helmet
摘要
申请公布号
US2306362(A)
申请公布日期
1942.12.22
申请号
US19380246177
申请日期
1938.12.16
申请人
ALFRED WOLFF
发明人
WOLFF ALFRED
分类号
A42B3/06
主分类号
A42B3/06
代理机构
代理人
主权项
地址
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