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This guy turned a $1 zipper into a $6 billion global empire! In 1934, Tadao Yoshida starts a zipper company in Tokyo with leftover inventory from a store that just went bankrupt. His crew makes every zipper by hand, twelve women at a table pressing each metal tooth into fabric one at a time. Then in 1950 an American buyer walks in and pulls out a US-made zipper: machine-produced, half the price, and far better quality. Yoshida realizes his whole business is already obsolete. So he goes to the Ministry of International Trade and Industry alone and gets permission to import an American chain machine. That machine earns YKK their first patent in 1953. Then Yoshida starts building his own machines from scratch. By 1964, YKK owns the best zipper machine and Yoshida guards the design like a state secret. The genius move: YKK makes everything that goes into their product. The brass, the thread, the tape, the machines. While every competitor needs to outsource parts of their production, YKK owns the whole chain. By the 1970s, YKK has overtaken Talon, the American company that invented the modern zipper. Today they ship over 10 billion zippers a year and generate $6.0B in revenue.