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摘要
申请公布号
US1868929(A)
申请公布日期
1932.07.26
申请号
US19310565541
申请日期
1931.09.28
申请人
THE SMYTH MANUFACTURING COMPANY
发明人
THOMPSON WALTER IRVING
分类号
B42B2/02
主分类号
B42B2/02
代理机构
代理人
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