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经营范围
发明名称
Pencil lead
摘要
申请公布号
US2238771(A)
申请公布日期
1941.04.15
申请号
US19390311944
申请日期
1939.12.30
申请人
EAGLE PENCIL COMPANY INC.
发明人
CHESLER ISIDOR
分类号
B43K19/02
主分类号
B43K19/02
代理机构
代理人
主权项
地址
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