Pencil sharpener

Details Pencil sharpener Pencil sharpener

1992-01-27

1993-05-04

Holtje, Nelson C.

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

D19 65, D19 99

Patent

active

D03353087

REFERENCES:
patent: D52550 (1918-10-01), Wilson
patent: D147863 (1947-11-01), Ness
patent: D152554 (1949-02-01), May
patent: D187767 (1960-04-01), Bacevius
patent: D240223 (1976-06-01), MacGregor
patent: D250035 (1978-10-01), Kajiwara
patent: D297438 (1988-08-01), Evenson
patent: D320812 (1991-10-01), Yuen

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