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The ornamental design for a ballpoint pen, as shown and described.
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FIG. 1 is a front view of a ballpoint pen of the present invention;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 10 2005 | KOCH, UWE | Ritter-Pen GmbH | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016243 | /0859 | |
| Jun 24 2005 | Ritter-Pen GmbH | (assignment on the face of the patent) | / |
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