Invention of the ballpoint pen. By Pizzas. Inventor of the ballpoint pen. László Bíró he came from Hungarian and was born in Budapest on September 19th, 1899 died on November 24th 1985 in Buenos Aires. How he did it.
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Simplest types-cap pens , made of metal or plastic (or both)
Others have a mechanism for retracting the tip, the mechanism is usually controlled by a button at the top and is powered by a spring within the body of the pen , but other possibilities include a pair of buttons , a screw , or a slide