Electric vacuum cleaner

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

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D02976757

REFERENCES:
patent: D246107 (1977-10-01), Yoshida et al.
patent: D259882 (1981-07-01), Yoshida et al.
patent: D270390 (1983-08-01), Ayukawa et al.
patent: D284319 (1986-06-01), Yamamoto et al.
patent: 4545794 (1985-10-01), Himukai
patent: 4592764 (1986-06-01), Ikezaki et al.
Hitachi, Ltd. Vacuum Cleaner Catalog, 4/1984, no. page number.

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