Trigger extension for a ring binder

Details Trigger extension for a ring binder Trigger extension for a ring binder

1992-04-30

1994-01-25

Burke, Wallace R.

Office supplies; artists and teachers materials

Book, album or cover

Element or attachment

Patent

active

D03436462

REFERENCES:
patent: 4522526 (1985-06-01), Lozfau et al.
patent: 4813803 (1989-03-01), Gross
patent: 5067840 (1991-11-01), Cooper et al.
patent: 5116157 (1992-05-01), Gillum et al.

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