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经营范围
发明名称
Mechanical pencil
摘要
申请公布号
US2491254(A)
申请公布日期
1949.12.13
申请号
US19460642157
申请日期
1946.01.19
申请人
ROBERT CECIL CO., INC.
发明人
DORFMAN ROBERT S.
分类号
B43K21/00;B43K21/16
主分类号
B43K21/00
代理机构
代理人
主权项
地址
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