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发明名称
Display sign structure
摘要
申请公布号
US2610423(A)
申请公布日期
1952.09.16
申请号
US19480008112
申请日期
1948.02.13
申请人
MARTIN WILLIAM A
发明人
MARTIN WILLIAM A.
分类号
G09F7/08
主分类号
G09F7/08
代理机构
代理人
主权项
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