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Photo: www.duckass.net / Lana's DuckAss
Yesterday marked 111 years since Eduard Slavoljub Penkala patented the world's first mechanical pencil. The Croatian engineer and inventor of Polish-Dutch origin is one of the most important inventors of the early 20th century. Shortly after inventing the first mechanical pencil, he also patented the first fountain pen with solid ink. After a series of patents, in 1911 Penkala opened his first office in Branimirova Street, Zagreb...
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