Dual vacuum cleaner design

Details Dual vacuum cleaner design Dual vacuum cleaner design

1988-02-22

1989-10-24

Dunkins, Bruce W.

Washing, cleaning, or drying machine

Washing, cleaning, or drying machine

Surface treatment, e.g., floor, street, etc.

Patent

active

D03042510

REFERENCES:
patent: D190112 (1961-04-01), Peterson
patent: D212710 (1968-11-01), Mango et al.
patent: D213639 (1969-03-01), Fegan
patent: 2986765 (1961-06-01), Ernolf et al.
patent: 4266317 (1981-05-01), Duda

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