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OHTO Ballpoint Pen - Rikumo
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Finally, China manufactures a ballpoint pen all by itself - The Washington Post
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The Story of László Bíró, the Man Who Invented the Ballpoint Pen | Smart News| Smithsonian Magazine
ballpoint pen - Wiktionary
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The ball just fell out of my ballpoint pen as I was writing in my notebook : r/mildlyinteresting
Ballpoint pen - Wikipedia
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The Best Ballpoint Pens | JetPens
A History of the Ballpoint Pen - Owlcation
Pen power: China closer to ballpoint success - BBC News
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Anterique Mach Ball .5mm Ballpoint Pen — The Gentleman Stationer
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