Pencil sharpener

Details Pencil sharpener Pencil sharpener

2011-05-24

2011-05-24

Albert, Elizabeth (Department: 2913)

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Perforating or cutting

Design Patent

active

D0638473

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

REFERENCES:
patent: D249152 (1978-08-01), Macowski
patent: D318983 (1991-08-01), Unger
patent: 5394613 (1995-03-01), Ku
patent: D357645 (1995-04-01), Wang
patent: D405830 (1999-02-01), Mak
patent: D442031 (2001-05-01), Perez
patent: D465149 (2002-11-01), Bennett et al.
patent: 6637481 (2003-10-01), Mak et al.
patent: D509851 (2005-09-01), Huang
patent: D539146 (2007-03-01), Schroeder
patent: D549781 (2007-08-01), Lau
patent: D577601 (2008-09-01), Kao
patent: D619120 (2010-07-01), Nikiforov et al.

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