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发明名称
Improvements in book markers
摘要
申请公布号
GB446437(A)
申请公布日期
1936.04.30
申请号
GB19340032738
申请日期
1934.11.14
申请人
FRANK HERBERT LOCKYER
发明人
分类号
B42D9/00
主分类号
B42D9/00
代理机构
代理人
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