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摘要
申请公布号
US1951053(A)
申请公布日期
1934.03.13
申请号
US19320618586
申请日期
1932.06.22
申请人
WALTER P. RITTER
发明人
JOHNSON WALFRED
分类号
A47G29/12
主分类号
A47G29/12
代理机构
代理人
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