Door lock

Tools and hardware – Locking or closing device – Lock – latch or bolt

Patent

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Patent

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D03199649

REFERENCES:
patent: 721045 (1903-02-01), Keller
patent: 3815945 (1974-06-01), Lamphere
patent: 3963269 (1976-06-01), Rosenberg
patent: 4076294 (1978-02-01), Holmberg
patent: 4195870 (1980-04-01), Percoco
patent: 4326394 (1982-04-01), Stein
patent: 4506527 (1985-03-01), Grill
patent: 4629231 (1986-12-01), Bouchard

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