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The ornamental design for a ballpoint pen, as shown and described.
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| Patent | Priority | Assignee | Title |
| D412342, | Dec 09 1997 | Pentel Kabushiki Kaisha | Mechanical pencil |
| D419541, | Jul 29 1998 | Canon Kabushiki Kaisha | Data input pen for computer |
| D444499, | May 31 2000 | Pentel Kabushiki Kaisha | Mechanical pencil |
| D450769, | Nov 24 2000 | Mitsubishi Pencil Co., Ltd. | Mechanical pencil |
| D452526, | Nov 10 2000 | Mitsubishi Pencil Co., Ltd. | Ball-point pen |
| D453790, | Nov 10 2000 | Mitsubishi Pencil Co., Ltd. | Ball-point pen with a mechanical pencil |
| D461501, | Jun 22 2001 | Mitsubishi Pencil Co., Ltd. | Ball-point pen |
| D463821, | Jun 22 2001 | Mitsubishi Pencil Co., Ltd. | Ball-point pen |
| D472577, | Sep 19 2001 | The Pilot Ink Co., Ltd. | Ball-point pen |
| D474241, | Dec 12 2001 | Tombow Pencil Co., Ltd. | Ball point pen |
| D478627, | Oct 07 2002 | Morris Pen Corporation | Pen |
| D478932, | Oct 07 2002 | Morris Pen Corporation | Pen |
| D489088, | Apr 08 2003 | The Pilot Ink Co., Ltd. | Ball-point pen |
| D495002, | Jul 14 2003 | Morris Corporation | Writing instrument |
| D500337, | Sep 03 2003 | Kabushiki Kaisha Pilot Corporation | Combined ball-point pen and correction tape dispenser |
| D506780, | Jun 13 2003 | Pentel Kabushiki Kaisha | Ball point pen |
| D510104, | Jun 11 2004 | BEIFA GROUP CO , LTD | Pen |
| D525302, | Jan 27 2004 | ZEBRA CO , LTD | Ballpoint pen |
| D527765, | Aug 03 2004 | Zebra Co., Ltd. | Ballpoint pen |
| GB2060027, | |||
| GB2104829, | |||
| GB3003903, | |||
| WO49905, | |||
| WO50420, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Sep 16 2005 | TSUCHIDA, MASAYUKI | Kabushiki Kaisha Pilot Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 017037 | /0990 | |
| Sep 26 2005 | Kabushiki Kaisha Pilot Corporation | (assignment on the face of the patent) | / |
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