Pencil sharpener

Details Pencil sharpener Pencil sharpener

1999-07-08

2000-02-08

Thompson, Martie

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

1906

Patent

active

D04203909

REFERENCES:
patent: 199448 (1878-01-01), Keyes
patent: D286576 (1986-11-01), Schneider et al.
patent: D396886 (1998-08-01), Melo et al.
patent: D402314 (1998-12-01), Lidle, Jr. et al.
patent: 2691960 (1954-10-01), Leeds et al.
patent: 3250257 (1966-05-01), Warner
patent: 4598478 (1986-07-01), Buschle
patent: 4991299 (1991-02-01), Dietterich et al.

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