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In what year was the ball bearing patented?

  • A.1794
  • B.1756
  • C.1748
  • D.1795

Answer: A

It was patented in 1794.

Philip Vaughan, a Welsh ironmaster, patented a design in which balls ran in a grooved track on a carriage axle - the first radial ball bearing. Leonardo had sketched the idea three centuries earlier.

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