Binder for large sheets

Office supplies; artists and teachers materials – Book – album or cover – Ring bound or looseleaf type

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D 3900

Patent

active

D03646408

REFERENCES:
patent: D97603 (1935-11-01), Kaufman
patent: 1940733 (1933-12-01), Seelman, Jr.
patent: 2786281 (1957-03-01), Kramer et al.
patent: 3514875 (1970-06-01), Howard
patent: 4108473 (1978-08-01), Coen et al.
patent: 4451067 (1984-05-01), Williams
patent: 4486032 (1984-12-01), Leahy
patent: 4624480 (1986-11-01), Marthaler
patent: 4685570 (1987-08-01), Medow
patent: 5028075 (1991-07-01), Donnelly

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