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经营范围
发明名称
Improvements in or relating to ink pencils
摘要
申请公布号
GB637331(A)
申请公布日期
1950.05.17
申请号
GB19470026495
申请日期
1947.10.01
申请人
WILLIAM WALTER HAMEL
发明人
分类号
B43K7/02
主分类号
B43K7/02
代理机构
代理人
主权项
地址
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