Combined smoke gasket and intumescent expanding seal device for

Building units and construction elements – Architectural stock material – Elongated

Patent

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D25119

Patent

active

D02939355

REFERENCES:
patent: 3964214 (1976-06-01), Wendt
patent: 4045930 (1977-09-01), Dixon
patent: 4144688 (1979-03-01), Dixon
patent: 4307543 (1981-12-01), Schulthess
patent: 4376354 (1983-03-01), Passovoy
patent: 4488387 (1984-12-01), Foti

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