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发明名称
Portable sign
摘要
申请公布号
US2262579(A)
申请公布日期
1941.11.11
申请号
US19390285686
申请日期
1939.07.21
申请人
FOREMAN JULES L
发明人
FOREMAN JULES L.
分类号
B60Q7/00;G09F13/00
主分类号
B60Q7/00
代理机构
代理人
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