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经营范围
发明名称
MECHANICAL PENCIL
摘要
申请公布号
CA306133(A)
申请公布日期
1930.11.25
申请号
CAD306133
申请日期
申请人
THE W. A. SHEAFFER PEN CO.
发明人
WILLIAM R. CUTHBERT;EARL W. SODEBERG
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