Pencil sharpener

Details Pencil sharpener Pencil sharpener

1998-09-28

1999-07-27

Holtje, Martie K.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

D21656, D19 82, D19 97, 1906

Patent

active

D04123441

REFERENCES:
patent: D78313 (1929-04-01), Ray
patent: D82802 (1930-12-01), Disney
patent: D98877 (1936-03-01), Lobel
patent: D103288 (1937-02-01), Ross
patent: D126734 (1941-04-01), Ross
patent: D169980 (1953-07-01), Knapp
patent: D250023 (1978-10-01), Perkins et al.
patent: D396184 (1998-07-01), Adams et al.
patent: 3980113 (1976-09-01), Birdsall

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