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发明名称
Improvements in sketch pads
摘要
申请公布号
GB568558(A)
申请公布日期
1945.04.10
申请号
GB19430017815
申请日期
1943.10.28
申请人
HERBERT EDWARD ELSDEN;SIDNEY FREDERIC BURGOINE
发明人
分类号
B42D5/00;B42D15/00
主分类号
B42D5/00
代理机构
代理人
主权项
地址
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