The Gem paper clip, the one that became widely popular, was never patented. It was introduced to the market in the late 19th century by the British company Gem Manufacturing Ltd. The design was so successful that it became the standard for paper clips, and it's the one most people envision when they think of a traditional paper clip. The lack of a patent allowed other manufacturers to produce similar designs, contributing to the widespread adoption of the Gem-style paperclip around the world.
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