Door knob

Tools and hardware – Handle – knob or pull – Simulative

Patent

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D 8307

Patent

active

D03701654

REFERENCES:
patent: D184621 (1959-03-01), Heyer et al.
patent: D186464 (1959-10-01), Louis
patent: D263813 (1982-04-01), Buschmann
patent: D288471 (1987-02-01), Gladstone
patent: D346458 (1994-04-01), Ferrante
patent: 2451913 (1948-10-01), Brice

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