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发明名称
Sign construction
摘要
申请公布号
US2925676(A)
申请公布日期
1960.02.23
申请号
US19570639726
申请日期
1957.02.12
申请人
YETMAN WILLIAM H
发明人
YETMAN WILLIAM H.
分类号
G09F13/04
主分类号
G09F13/04
代理机构
代理人
主权项
地址
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