Ventilation grille

Details Ventilation grille Ventilation grille

1999-01-22

2000-01-25

Siegel, Mitchell

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

2304

Patent

active

D04196686

REFERENCES:
patent: D318 (1850-09-01), Tuttle et al.
patent: D320 (1850-09-01), Tuttle et al.
patent: D23934 (1895-01-01), Hardenbergh
patent: D30568 (1899-04-01), Ullberg
patent: D30569 (1899-04-01), Ullberg
patent: D31446 (1899-08-01), Vanderloo
patent: D34348 (1901-04-01), Ullberg
patent: D140499 (1945-03-01), Curtis
patent: D361378 (1995-08-01), Mitchell
patent: D377083 (1996-12-01), Smolarski
patent: D407480 (1999-03-01), Leiter et al.

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