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What Did Slavoljub Eduard Penkala Invent?

Answer

Slavoljub Eduard Penkala was a Croatian engineer and inventor of the first mechanical pencil or then called 'automatic pencil' in 1906 and the first solid-ink fountain pen in 1907. He also designed the first Croatian two-seat aeroplane in 1909. Together with an entrepreneur named Edmund Moster, he started a factory of pens and pencils called 'Penkala-Moster' and it still exists today called 'TOZ-Penkala'.
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The mechanical pencil was invented by Slavoljub Eduard Penkala and has many parts. This invention was made in 1882. It required some very intricate manufacturing ...
Slavoljub Eduard Penkala invented a solid ink fountain pen in 1907 but it wasn't until 1910 that the ballpoint pen was invented by a German inventor named Baum. ...
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