Patent Model - Watch-Case Hinge
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Frederick Rapp, Patentee
Jul 06 1886
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Rapp's patent is an improvement of his earlier patents numbers 301,156; 313,448 and 313,449; as well as his reissue patent number 10,517. His "improvement over said construction lies in the greater simplicity, practicability, strength, efficiency, and cheapness, all of which are attained..." in his construction. (Patent Number 344,859)
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