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Robert Barronin created the first double acting tumbler lock.
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Joseph Bramah created the Bramah lock.
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Jeremiah Chubb created the detector lock with a high internal security.
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Linus Yale Sr. created the first pin tumbler lock.
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James Sargent created the first combination lock.
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James Sargent created the first time lock mechanism.
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Samuel Segal created the jimmy-proof lock.
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Harry Soref creates the first padlock.
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