Pencil sharpener

Details Pencil sharpener Pencil sharpener

2007-05-01

2007-05-01

Albert, Elizabeth A. (Department: 2913)

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

Design Patent

active

29242075

CLAIM:
The ornamental design for a pencil sharpener, as shown and described.

REFERENCES:
patent: D147863 (1947-11-01), Ness
patent: D151456 (1948-10-01), Kihlberg
patent: D152554 (1949-02-01), May
patent: D155129 (1949-09-01), Degefors
patent: D158296 (1950-04-01), Landeborn
patent: D159400 (1950-07-01), Wimmer
patent: D171126 (1953-12-01), Fryer
patent: D189384 (1960-11-01), Hohmann
patent: D284391 (1986-06-01), Obenski
patent: D335308 (1993-05-01), Shapiro et al.
patent: 5875555 (1999-03-01), Andrisin et al.
patent: D417238 (1999-11-01), Huang

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