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发明名称
Multiple ribbon spool
摘要
申请公布号
US2396805(A)
申请公布日期
1946.03.19
申请号
US19440566810
申请日期
1944.12.06
申请人
DAVID SCHWARTZ
发明人
SCHWARTZ DAVID
分类号
B65H35/00
主分类号
B65H35/00
代理机构
代理人
主权项
地址
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