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发明名称
Sign holder
摘要
申请公布号
US3058246(A)
申请公布日期
1962.10.16
申请号
US19580768115
申请日期
1958.10.20
申请人
SCHOEFFIER WILLIAM A
发明人
SCHOEFFIER WILLIAM A.
分类号
G09F7/18
主分类号
G09F7/18
代理机构
代理人
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