Pencil sharpener

Details Pencil sharpener Pencil sharpener

2011-06-14

2011-06-14

Albert, Elizabeth (Department: 2913)

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

Design Patent

active

D0639858

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

REFERENCES:
patent: D249152 (1978-08-01), Macowski
patent: D320311 (1991-10-01), Kuhn
patent: D324700 (1992-03-01), Shimoo et al.
patent: D357645 (1995-04-01), Wang
patent: D405830 (1999-02-01), Mak
patent: 6637481 (2003-10-01), Mak et al.
patent: 6737481 (2004-05-01), Kurian et al.
patent: D549781 (2007-08-01), Lau
patent: 7472728 (2009-01-01), Geffen
patent: D597602 (2009-08-01), Racamier et al.

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