Aquarium filter

Details Aquarium filter Aquarium filter

1976-09-30

1977-12-27

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D2301

Patent

active

D02467933

REFERENCES:
patent: D174482 (1955-04-01), Willinger et al.
patent: D190273 (1961-05-01), Stark
patent: D213555 (1969-03-01), Willinger
patent: D213691 (1969-04-01), Rosenel
patent: D232027 (1974-07-01), Levin
patent: 3477580 (1969-11-01), Willinger
patent: 3630367 (1971-12-01), Willinger
patent: 3746168 (1973-07-01), Willinger et al.
patent: 3746169 (1973-07-01), Willinger et al.

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