Pen

The ornamental design for a pen, as shown and described.

FIG. 1 is a perspective view of the design;

FIG. 2 is an elevational view of the front of the design, the rear and both sides being identical to the front;

FIG. 3 is an enlarged plan view of the bottom of the design; and,

FIG. 4 is an enlarged plan view of the top of the design.

Patent	Priority	Assignee	Title
2693788,
3570284,
188575,
D369830,	Sep 08 1995	CHARTPAK, INC	Tubular pen
D416286,	Mar 05 1996		Pen housing
D416578,	Mar 05 1996		Pen housing
D417698,	Sep 28 1998	KABUSHIKI KAISHA PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION	Writing instrument
D423575,	Oct 12 1999		Pen and fan combination
D474808,	Jul 08 2002	World Trend, Inc.	Rocket ball point pen
D482394,	Dec 16 2002		Writing pen with a base
D541338,	Jun 30 2004		Pen
D597134,	Mar 07 2008		Chopsticks with function of a pen
DEM52726,

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