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			 The ornamental design for a pen, as shown and described. 
			  
			  
			  
			  
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FIG. 1 is a front left perspective view of a pen showing my new design with the pen tip retracted;
FIG. 2 is a rear right perspective view of the pen shown in FIG. 1 with the pen tip extended;
FIG. 3 is a rear right perspective view of the pen shown in FIG. 2 with the pen tip retracted;
FIG. 4 is front right perspective view of the pen shown in FIG. 1 with the pen tip extended;
FIG. 5 is a front elevation view of the pen shown in FIG. 1;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a rear elevation view thereof;
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a left side view thereof.
| Patent | Priority | Assignee | Title | 
| 153679, | |||
| D436996, | Nov 16 1999 | Kotobuki & Co., Ltd. | Writing instrument | 
| D472578, | Apr 02 2002 | INNODESK, INC | Capless retractable marking instrument | 
| D487773, | Dec 20 2002 | Kotobuki & Co., Ltd. | Writing instrument | 
| D489408, | Mar 17 2003 | BEIFA GROUP CO , LTD | Pen | 
| D500339, | Apr 02 2004 | Pen | 
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Oct 19 2004 | QIU, ZHIMING | NINGBO BEIFA GROUP CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 015948 | /0737 | |
| Oct 29 2004 | Ningbo Beifa Group Co., Ltd. | (assignment on the face of the patent) | / | |||
| Dec 30 2004 | NINGBO BEIFA GROUP CO , LTD | BEIFA GROUP CO , LTD | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 021118 | /0044 | 
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