Johan Vaaler, a Norwegian inventor, is credited with inventing the paperclip. It was patented in the US as were several other variations but it wasn’t until the English company GEM streamlined the design to the double oval we know today and an American, William Middlebrook, of Waterbury, Connecticut, patented a machine for making paper clips of the Gem design in 1899. The design for the GEM paperclip was never patented.
During WWII, Norwegians were prohibited from wearing any insignia on their clothing with the king’s likeness so they wore paperclips in their lapels as a symbol of resistance to the Nazi occupation.
Alternately, after WWII, the Americans started a project called Operation Paperclip to recruit former-Nazi scientists to work in the US after the war.
Oh, little paper clip, what an intersting life you lead!