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经营范围
发明名称
Mechanical pencil
摘要
申请公布号
US1905920(A)
申请公布日期
1933.04.25
申请号
US19310517898
申请日期
1931.02.24
申请人
W. A. SHEAFFER PEN COMPANY
发明人
LINDEMON WILLIAM H.
分类号
B43K21/08;B43K27/02
主分类号
B43K21/08
代理机构
代理人
主权项
地址
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