When Johann Vaaler patented his paper clip in 1901, there already were similar designs on the books. William Middlebrook of Waterbury, Connecticut patented his design in 1899. Cornelius Brosnan of Springfield, Massachusetts patented his Konaclip in 1900.
So, who was first? Well, it is thought to be Johann Vaaler. Drawings of his design date to early 1899, but since Norway had no patent law at the time, he had to seek patent rights in Germany and the US in the following years.
Johann Vaaler was born on 15 March 1866 in Aurskog, Norway. Known as an innovator in his youth, he graduated in electronics, science and mathematics. He was employed by the owner of a invention office when he invented the paperclip in 1899.