Yale Home US on X: "In the 1840s, Linus Yale Jr. perfected his father's design and invented the world's first pin tumbler cylinder lock - a lock we still use around the
Linus Yale Jr. - Wikipedia
Yale Linus Smart Lock - Award-Winning Linus Lock
Linus Yale Jr. - Autograph Letter Signed | HistoryForSale Item 350452
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NIHF Inductee Linus Yale, Who Invented the Door Lock