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发明名称
Lead pencil
摘要
申请公布号
US2081057(A)
申请公布日期
1937.05.18
申请号
US19360089191
申请日期
1936.07.06
申请人
JOSEPH MCDONALD FRANCIS
发明人
MCDONALD FRANCIS JOSEPH
分类号
B43K21/08
主分类号
B43K21/08
代理机构
代理人
主权项
地址
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