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发明名称
Improvements in or relating to document files
摘要
申请公布号
GB950768(A)
申请公布日期
1964.02.26
申请号
GB19610033308
申请日期
1961.09.18
申请人
SIEGFRIED BAUMGART;HANS-JOACHIM OTTO
发明人
分类号
B42F13/12
主分类号
B42F13/12
代理机构
代理人
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地址
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