发明名称 Vacuum nozzle for carpeted stair treads and risers
摘要 A suction nozzle is provided which is comprised of a one piece outer cylindrical body member of predetermined fixed dimensions provided with an internal movable sleeve for adapting the nozzle to effectively and more conveniently extract dirt from carpeted stair treads or riser without changing the dimensions of the nozzle.
申请公布号 US4374446(A) 申请公布日期 1983.02.22
申请号 US19810250563 申请日期 1981.04.03
申请人 CERTIFIED CHEMICAL & EQUIPMENT CO. 发明人 COPPERMAN, MARCUS
分类号 A47L9/02;(IPC1-7):A47L9/06 主分类号 A47L9/02
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