Aquarium filter

Details Aquarium filter Aquarium filter

1997-07-30

1998-03-24

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Treatment

2301

Patent

active

D03927172

REFERENCES:
patent: D228656 (1973-10-01), Lovitz
patent: D368297 (1996-03-01), Dunlap
patent: 4944871 (1990-07-01), Ogawa
patent: 5092991 (1992-03-01), Ogawa
patent: 5401401 (1995-03-01), Hickok et al.
patent: 5665227 (1997-09-01), Watt

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