Paper fastener

Details Paper fastener Paper fastener

1990-06-11

1993-08-03

Holtje, Nelson C.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

D19 86, D20 28

Patent

active

D03380408

REFERENCES:
patent: D256374 (1980-08-01), Gerber et al.
patent: D256476 (1980-08-01), Gerber et al.
patent: 726104 (1903-04-01), Schumann
patent: 857778 (1907-06-01), Wittstein
patent: 1691838 (1928-11-01), Boshart
patent: 2230585 (1941-02-01), Canter
patent: 3757389 (1973-09-01), Wiland
patent: 4198772 (1980-04-01), Furutu
patent: 4981385 (1991-01-01), Niblock
patent: 5018895 (1991-05-01), Meier, Jr.

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