1866 – Born on March 15th in Aurskog. Johann Vaaler, of Christiania, Norway, received a German patent for the paper clip.
1899 – He invented the paper clip design and received the patented in Germany.
1901 – Received the U. S. patent for a "Paper Clip or Holder" ("forming same of a spring material, such a piece of wire, that is bent to a rectangular, triangular of otherwise shaped hoop, the end parts of which wire piece form members of tongues lying side by side in contrary directions").
1910 – Died on March 14th in Kristiania.