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发明名称
Sheet binder
摘要
申请公布号
US2377340(A)
申请公布日期
1945.06.05
申请号
US19410373021
申请日期
1941.01.03
申请人
GRINNELL GEORGE G
发明人
GRINNELL GEORGE G.
分类号
B42B5/00
主分类号
B42B5/00
代理机构
代理人
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