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发明名称
Spools for business machines
摘要
申请公布号
US3051287(A)
申请公布日期
1962.08.28
申请号
US19600033187
申请日期
1960.06.01
申请人
WALTER GRAFTON & SON LIMITED
发明人
GRAFTON ERIC ALEXANDER
分类号
B41J33/00
主分类号
B41J33/00
代理机构
代理人
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