发明名称 Combination tiered letter tray and vertical file
摘要 A tiered letter tray comprising at least two trays detachably stacked one upon another by rectangular plastic riser plates and a vertical file comprising at least one L-shaped trough having means at one side of its base for selective attachment to the side of the bottom letter tray, said trough adapted at the other side of its base for selective attachment to one side of a like trough, and an end cap adapted for selective attachment to said one side of the base for using said trough detached from said letter tray.
申请公布号 US4074810(A) 申请公布日期 1978.02.21
申请号 US19760727227 申请日期 1976.09.27
申请人 RUBBERMAID COMMERCIAL PRODUCTS INC. 发明人 JUERGENS, DAVID A.;TEREK, GREG P.
分类号 B42F7/12;(IPC1-7):A47F7/00 主分类号 B42F7/12
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