Back-carried vacuum cleaner

Washing – cleaning – or drying machine – Washing – cleaning – or drying machine – Surface treatment – e.g. – floor – street – etc.

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D03125173

REFERENCES:
patent: D204232 (1966-04-01), Nelson
patent: D204366 (1966-04-01), Nelson
patent: D204367 (1966-04-01), McGuire
patent: D205759 (1966-09-01), La Mers et al.
patent: D219835 (1971-02-01), Otto et al.
patent: 1047164 (1912-12-01), Butenschoen
patent: 1099560 (1914-06-01), Matchette
patent: 1255662 (1918-02-01), Sullivan
patent: 2392205 (1946-01-01), Wales
patent: 2595752 (1952-05-01), Batts
patent: 2854686 (1958-10-01), Hansen
patent: 3165774 (1965-01-01), Barba
patent: 3286446 (1966-11-01), Happe et al.
patent: 3331090 (1967-07-01), Reiber et al.
patent: 4325162 (1982-04-01), Chambers et al.

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