Aquarium gravel cleaner

Details Aquarium gravel cleaner Aquarium gravel cleaner

1982-09-22

1985-12-31

Largen, James R.

Animal husbandry

Feeder or waterer

Bird feeder

Patent

active

D02820161

REFERENCES:
patent: D166284 (1952-03-01), Weilburg
patent: D198200 (1964-05-01), Willinger
patent: D214918 (1969-08-01), Willinger
patent: 2828019 (1958-03-01), Lambertson
patent: 2899063 (1959-08-01), Ellis
patent: 2956507 (1960-10-01), Hutchinson
patent: 3158104 (1964-11-01), Hutchinson
patent: 3225930 (1965-12-01), Willinger
patent: 3302789 (1967-02-01), Holt
patent: 3360129 (1967-12-01), Powers
patent: 3630364 (1971-12-01), Johnson
patent: 3734853 (1973-05-01), Horvath
patent: 3826371 (1974-07-01), Adamson
patent: 4233702 (1980-11-01), Zweifel

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