Shutter louver with vent openings

Details Shutter louver with vent openings Shutter louver with vent openings

1991-06-03

1993-04-20

Word, A. Hugo

Building units and construction elements

Prefabricated unit

Closure

Patent

active

D03349870

REFERENCES:
patent: D181623 (1957-12-01), Brand
patent: D220474 (1971-04-01), Sassano
patent: D306501 (1990-03-01), Scarrone
patent: 2814341 (1957-11-01), Piana
patent: 3044387 (1962-07-01), Hinden
patent: 3631790 (1972-01-01), Olsen et al.
patent: 3782050 (1974-01-01), Dowdell et al.
patent: 4103468 (1978-08-01), Olsen
patent: 4733515 (1988-03-01), Schmidlin

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