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发明名称
Improvements in and relating to markers for ledger and like sheets
摘要
申请公布号
GB509638(A)
申请公布日期
1939.07.19
申请号
GB19380008931
申请日期
1938.03.23
申请人
MARIE KAROLYN CASSIN
发明人
分类号
B42F19/00
主分类号
B42F19/00
代理机构
代理人
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