Automatic sliding door

Building units and construction elements – Prefabricated unit – Closure

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D03470687

REFERENCES:
patent: D292317 (1987-10-01), Martinelli
patent: 1948596 (1934-02-01), Ross
patent: 2511108 (1950-06-01), Hansen
patent: 3226778 (1966-01-01), Kollsman et al.
patent: 3864881 (1975-02-01), Wolf
patent: 4003102 (1977-01-01), Hawks et al.
patent: 4596093 (1986-06-01), Esposito
patent: 4752106 (1988-06-01), Salvarani
patent: 5038517 (1991-08-01), Talbott

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