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发明名称
Hand-carried traffic signal
摘要
申请公布号
US1966822(A)
申请公布日期
1934.07.17
申请号
US19330653371
申请日期
1933.01.25
申请人
IRVING LIEB
发明人
LIEB IRVING
分类号
G08B5/00
主分类号
G08B5/00
代理机构
代理人
主权项
地址
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