Filter

Details Filter Filter

1998-02-06

1998-12-15

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Treatment

2301

Patent

active

D04027353

REFERENCES:
patent: D306640 (1990-03-01), Kott
patent: D366516 (1996-01-01), Stewart
patent: 3448862 (1969-06-01), Kudaty
patent: 4560477 (1985-12-01), Moldow
patent: 4735720 (1988-04-01), Kersting
patent: 5211849 (1993-05-01), Kott et al.
patent: 5531848 (1996-07-01), Brinda et al.
Front cover of Pleatco's "Replacement Swimming Pool and Spa Filter Cartridge Catalog"; Date of Publication: 1991; Place of Publication United States.
Unicel's 1998 Replacement Guide (cover and pp. 1 and 71); date of Publication: unknown, but copyright notice indicates similar guides have been published since 1985; Place of Publication: United States.

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