Drain construction

Details Drain construction Drain construction

1999-02-26

2000-02-29

Douglas, Alan P.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

2301

Patent

active

D04212959

REFERENCES:
patent: D370716 (1996-06-01), Menzies
patent: 1195827 (1916-08-01), Lucke
patent: 3081042 (1963-03-01), Moskovitz
patent: 3212416 (1965-10-01), Boersma
patent: 3268920 (1966-08-01), Beer
patent: 3495280 (1970-02-01), Galbiati
patent: 3561017 (1971-02-01), Holland
patent: 4257892 (1981-03-01), Boersma
patent: 4935129 (1990-06-01), Wang
patent: 4999858 (1991-03-01), Wu

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