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经营范围
发明名称
Mechanical Pencil
摘要
申请公布号
GB2025855(A)
申请公布日期
1980.01.30
申请号
GB19780030326
申请日期
1978.07.19
申请人
CHAO WEN KWEI
发明人
分类号
B43K21/00;B43L19/02;(IPC1-7):B43K21/00
主分类号
B43K21/00
代理机构
代理人
主权项
地址
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