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ballpoint pen

writing implement
Also known as: biro

Quick Summary

A ballpoint pen is a writing implement that uses a small rotating metal ball as its writing point. This ball is continuously supplied with ink from an inner reservoir and transfers it to the writing surface as it rolls. While commercial models appeared in the late 19th century, the first satisfactory model was patented by László Bíró, a Hungarian inventor living in Argentina. His design, often called a "biro," gained popularity in the late 1930s and became widely used globally by the mid-1940s.12

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