Pencil sharpener

Details Pencil sharpener Pencil sharpener

1986-02-24

1988-08-30

Rademaker, Charles A.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

Patent

active

D02974380

REFERENCES:
patent: D137884 (1944-05-01), Yellin
patent: D200616 (1965-03-01), Fairchild
patent: D208282 (1967-08-01), Speers
patent: D250035 (1978-10-01), Kajiwara
patent: 3659637 (1972-05-01), Condon

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