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经营范围
发明名称
Electric eraser
摘要
申请公布号
US2343237(A)
申请公布日期
1944.03.07
申请号
US19430502680
申请日期
1943.09.16
申请人
MCELROY JOHN H;KALKHUIS FRED W
发明人
MCELROY JOHN H.;KALKHUIS FRED W.
分类号
B43L19/00
主分类号
B43L19/00
代理机构
代理人
主权项
地址
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