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发明名称
Direction signal
摘要
申请公布号
US2338748(A)
申请公布日期
1944.01.11
申请号
US19410395195
申请日期
1941.05.26
申请人
HORACE WATKISS
发明人
WATKISS HORACE
分类号
B60Q1/34
主分类号
B60Q1/34
代理机构
代理人
主权项
地址
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