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发明名称
SIGN OR DISPLAY APPARATUS
摘要
申请公布号
CA313355(A)
申请公布日期
1931.07.21
申请号
CAD313355
申请日期
申请人
ALFRED WILLIAM BEUTTELL
发明人
ALFRED WILLIAM BEUTTELL
分类号
主分类号
代理机构
代理人
主权项
地址
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