In a house in Rockport, Maine there is a plaque that recognizes Mason Crockett Gregory with the invention of the doughnut hole, in 1847. The reason why? He hated doughnuts with an uncooked center.
Even if Captain Gregory came up with the idea, John Blondell was awarded the patent for the first doughnut cutter in 1872. Blondell's version was made of wood, but an 'improved' tin version with a fluted edge was patented in 1889
Extracted from A Short History Of Doughnuts at http://www.essortment.com/short-history-doughnuts-41711.html