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发明名称
Back-up warning signal for automotive vehicles
摘要
申请公布号
US2972139(A)
申请公布日期
1961.02.14
申请号
US19590814731
申请日期
1959.05.21
申请人
MERRITT KNUTSON
发明人
KNUTSON MERRITT
分类号
B60Q1/22
主分类号
B60Q1/22
代理机构
代理人
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