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发明名称
Vacuum cleaner electric indicator
摘要
申请公布号
US2320368(A)
申请公布日期
1943.06.01
申请号
US19380218646
申请日期
1938.07.11
申请人
QUADREX CORPORATION
发明人
LEATHERS WARD
分类号
A47L9/19;A47L9/28
主分类号
A47L9/19
代理机构
代理人
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