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发明名称
Safety device
摘要
申请公布号
US1952293(A)
申请公布日期
1934.03.27
申请号
US19320623318
申请日期
1932.07.19
申请人
WILLIAM SPENGLER
发明人
SPENGLER WILLIAM
分类号
A44C19/00
主分类号
A44C19/00
代理机构
代理人
主权项
地址
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