Do you know how a ballpoint pen works and how it was invented? - India Today
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biro - Wiktionary
Biro ballpoint pen | Science Museum Group Collection
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Biro and the Ballpoint Pen - YouTube
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László József Bíró - Vikipedi
Learn About Who Invented the Ubiquitous Ballpoint Pen
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The Biro, the invention that changed the writing game
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NIHF Inductee Laszlo Biro, Who Invented the Ballpoint Pen
Bic Pen: a cheap design that changed the history - DesignWanted : DesignWanted
Who was Ladislao José Biro, how did he invent the ballpoint pen and how did it help in World War II?
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