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经营范围
发明名称
Directional signal
摘要
申请公布号
US2197226(A)
申请公布日期
1940.04.16
申请号
US19360115796
申请日期
1936.12.14
申请人
SMITH BURGESS W
发明人
SMITH BURGESS W.
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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