Fastener for perforated documents

Office supplies; artists and teachers materials – Book – album or cover – Element or attachment

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Details

D19 65, D19 86, D8368, 1904

Patent

active

D04302044

REFERENCES:
patent: D317177 (1991-05-01), Boschetti
patent: D405381 (1999-02-01), Perrin et al.
patent: 2063548 (1936-12-01), Greer
patent: 2112389 (1938-03-01), Trussell
patent: 2363848 (1944-11-01), Emmner
patent: 4607970 (1986-08-01), Heusinkveld
patent: 4792253 (1988-12-01), Jacobson

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