South Australia William Gray (inventor) (1850–1903), American inventor and entrepreneur, inventor of the payphone and the baseball chest protector William Gray (architect) (1851–1927), American architect William Gray (RAF officer) (1898–?), First World War flying ace one of the founders of William Gray & Company, a British shipbuilding company, established in 1863 Bill Gray, co-founder (with his wife) of Bill Gray's, an American chain of fast-food restaurants based in New York State See also William Grey (disambiguation) William Grayson (disambiguation) Gray (surname)