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发明名称
Direction indicator
摘要
申请公布号
US1881632(A)
申请公布日期
1932.10.11
申请号
US19300484301
申请日期
1930.09.25
申请人
JOHANNESSEN RALPH A
发明人
JOHANNESSEN RALPH A.
分类号
B60Q1/34
主分类号
B60Q1/34
代理机构
代理人
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