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发明名称
WRITING AID
摘要
申请公布号
GB8601215(D0)
申请公布日期
1986.02.19
申请号
GB19860001215
申请日期
1986.01.18
申请人
HELIX LTD
发明人
分类号
B42D5/00;B42F9/00;B43L3/00;B43L5/02;(IPC1-7):B42D17/00
主分类号
B42D5/00
代理机构
代理人
主权项
地址
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