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发明名称
Backspacing mechanism
摘要
申请公布号
US2477702(A)
申请公布日期
1949.08.02
申请号
US19460669805
申请日期
1946.05.15
申请人
RALPH C. COXHEAD CORPORATION
发明人
NORTON CHARLES W.
分类号
B41J25/02
主分类号
B41J25/02
代理机构
代理人
主权项
地址
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