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In 1897, African-American inventor Alfred Cralle patented the first ice cream scoop. His original design remains in wide use, even today.
January 16, 1901: Born, Frank Zamboni. Frank and his brother Lawrence owned and operated a block ice business, but with the advent of the electric refrigerator, they knew their days were numbered. They opened an ice rink instead, which led to Frank's invention of a machine for resurfacing the ice. "It took him nine years," his son said. "One of the reasons he stuck with it was because everyone told him he was crazy."
An inventor as well as physicist, Dr. George Carruthers was instrumental in the design of lunar surface ultraviolet cameras. He was also Head of the Ultraviolet Measurements Branch of the Naval Research Laboratory.