发明名称 ENVELOPE-OPENING DEVICES
摘要 An envelope-opening device comprising an integral plastic body having coextensive portions flexibly connected at one end by an integral transverse portion and a longitudinal envelope receiving and guiding open side slot having opposite surfaces on the respective coextensive body portions, with a cutting blade projecting from one of the surfaces into the slot at the end of the slot opposite the hinge portion.
申请公布号 US3639983(A) 申请公布日期 1972.02.08
申请号 USD3639983 申请日期 1970.01.13
申请人 RICHARD T. KNIPFING 发明人 RICHARD T. KNIPFING
分类号 B43M7/00;(IPC1-7):B26B29/00 主分类号 B43M7/00
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