Clean exhaust air upright vacuum

Details Clean exhaust air upright vacuum Clean exhaust air upright vacuum

2007-06-11

2010-02-09

Redding, David A (Department: 3723)

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

C015S331000, C015S334000, C015S327200, C015S351000, C015S352000

Reexamination Certificate

active

07657966

ABSTRACT:
An upright bypass type vacuum base section pulls from a suction chamber surrounding the bag.

REFERENCES:
patent: 2295981 (1942-09-01), White
patent: 4171553 (1979-10-01), Stein
patent: 4955106 (1990-09-01), Stein et al.
patent: 5056175 (1991-10-01), Stein et al.
patent: 5228169 (1993-07-01), Stein et al.
patent: 5255410 (1993-10-01), Stein et al.
patent: 5560074 (1996-10-01), Graham et al.
patent: 5819370 (1998-10-01), Stein
patent: 2003/0131439 (2003-07-01), Wen
patent: 2005/0000054 (2005-01-01), Ninomiya et al.
patent: 2007/0289088 (2007-12-01), Mayes et al.

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