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发明名称
Improvements in or relating to files for letters or other documents
摘要
申请公布号
GB797648(A)
申请公布日期
1958.07.09
申请号
GB19560033589
申请日期
1956.11.02
申请人
JOHN GUSTAF SODERSTROM
发明人
分类号
B42F13/28
主分类号
B42F13/28
代理机构
代理人
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