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发明名称
Typist's copying gauge
摘要
申请公布号
US2115331(A)
申请公布日期
1938.04.26
申请号
US19360081626
申请日期
1936.05.25
申请人
SAMUEL FORD
发明人
FORD SAMUEL
分类号
B41J29/15
主分类号
B41J29/15
代理机构
代理人
主权项
地址
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