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经营范围
发明名称
ELECTRIC ERASER
摘要
申请公布号
CA426938(A)
申请公布日期
1945.04.24
申请号
CAD426938
申请日期
申请人
FRED W. KALKHUIS;JOHN H. MCELROY
发明人
JOHN H. MCELROY;FRED W. KALKHUIS
分类号
主分类号
代理机构
代理人
主权项
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