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经营范围
发明名称
Improvements in or relating to loose-leaf book-keeping devices
摘要
申请公布号
GB689902(A)
申请公布日期
1953.04.08
申请号
GB19490027685
申请日期
1949.10.28
申请人
WILLIAM HERBERT TOD
发明人
分类号
B42D12/00
主分类号
B42D12/00
代理机构
代理人
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