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Ladislao José Biro invented a “miraculous” pen and changed the way we write - Vox
History of the Pen - Wikiversity
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How the Ballpoint Pen Changed Handwriting - The Atlantic
Fountain pen - Wikipedia
Who Invented The Ballpoint Pen? Origins Of A Modern Writing Instrument | Unsharpen
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Who Invented the Pen? A History of Writing - Quality Logo Products
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Ballpoint Pen History: Why the Invention Was Such a Big Deal | Time
