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经营范围
发明名称
Letter aperture blocking device.
摘要
申请公布号
GB2109080(A)
申请公布日期
1983.05.25
申请号
GB19810030648
申请日期
1981.10.10
申请人
KENNETH * ATKINSON
发明人
KENNETH * ATKINSON
分类号
A47G29/124;F16B2/14;(IPC1-7):F16B2/14;A47G29/12
主分类号
A47G29/124
代理机构
代理人
主权项
地址
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