Vent stack cover

Details Vent stack cover Vent stack cover

1991-04-04

1993-07-06

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

D23373, D23374

Patent

active

D03371522

REFERENCES:
patent: D139787 (1944-12-01), Hausman
patent: D252337 (1979-07-01), Hehnen
patent: D268826 (1983-05-01), Carbajales
patent: D275311 (1984-08-01), Wolfe
patent: D286560 (1986-11-01), Wolfe
patent: 1893993 (1933-01-01), Hirsch
patent: 2855712 (1958-10-01), Diletto
patent: 3153871 (1964-10-01), Semba

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