Ring binder

Details Ring binder Ring binder

1989-01-18

1991-05-14

Burke, Wallace R.

Office supplies; artists and teachers materials

Book, album or cover

Ring bound or looseleaf type

Patent

active

D03168727

REFERENCES:
patent: D265989 (1982-08-01), Harris et al.
patent: 976166 (1910-11-01), Gray
patent: 1426657 (1922-08-01), Long
patent: 2180997 (1939-11-01), Rubilino
patent: 4724957 (1988-02-01), Burgschweiger

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