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Pentel Kabushiki Kaisha
| Pentel Kabushiki Kaisha Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20110271870 | INK FOR BALLPOINT PENS AND BALLPOINT PEN USING SAME - A ballpoint pen ink ensuring a very soft and smooth writing feel even when a strong writing pressure is applied, is obtained. | 11-10-2011 |