Pencil sharpener

Details Pencil sharpener Pencil sharpener

1999-10-04

2000-04-04

Holtje, Martie K.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

1906

Patent

active

D04223136

REFERENCES:
patent: D187120 (1960-01-01), Smith
patent: D251008 (1979-02-01), Kajiwara
patent: D265323 (1982-07-01), Macowski
patent: D320812 (1991-10-01), Yuen
patent: D354987 (1995-01-01), Yuen
patent: D390264 (1998-02-01), Singleton et al.
patent: 2504194 (1950-04-01), Harrington
patent: 3134365 (1964-05-01), Hori
Miller Office Products, c1995, p. 759, see circled pencil sharpener, upper right.

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