Pencil sharpener

Details Pencil sharpener Pencil sharpener

1998-06-01

1999-02-23

Holtje, Martie K.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

D19 65, 1906

Patent

active

D04061730

REFERENCES:
patent: D199473 (1964-10-01), Shuler
patent: D215379 (1969-09-01), Mizumo
patent: D237610 (1975-11-01), Macowski
patent: D320812 (1991-10-01), Yuen
patent: D390264 (1998-02-01), Singleton et al.
patent: D396062 (1998-07-01), White et al.
patent: 3134365 (1964-05-01), Hori
patent: 3556182 (1971-01-01), Tanigami
patent: 3678975 (1972-07-01), Imanishi et al.

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