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Ladislao José Biro 117th Birthday - Inventor of the modern ballpoint pen

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Ladislao Jose Biro (László József Bíró) is the inventor of the ballpoint pen like we know today. Today, google honors him with a Google Doodle to his 117th birthdayA little animation, where you can see the rolling ball inside a pen and more information you will find in this good video... (más)

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