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What did tailor Jacob Davis invent and patent alongside Levi Strauss in 1873 to make work pants highly durable?

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Correct answer: Copper rivets

Jacob Davis came up with the brilliant idea to reinforce strain points like pocket corners with small copper rivets after a customer complained about ripping pants. Because he lacked the money to file a patent, he partnered with his fabric supplier, Levi Strauss, creating the iconic blueprint for modern jeans in 1873. Photo: unknown (Life time: 1908), Wikimedia Commons, Public domain.

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Source: Wikipedia (CC BY-SA)

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