Nancy Maria Johnson died in Washington, D.C., at the age of 95. Her death marks the end of the life of the inventor of the hand-cranked ice cream freezer. She is buried at Oak Hill Cemetery in Washington, D.C.

William G. Young improved on the ice cream freezer patented by Nancy Johnson. Young's improvements included modifications to the handle and the internal spatula, enhancing the cooling process and speeding up the freezing of the ice cream.

Nancy Maria Johnson received a patent for the first hand-cranked ice cream freezer (US3254A) in the United States. This invention revolutionized ice cream production, making it more accessible and less labor-intensive. She also made her final changes to her patent on this day.

Nancy Maria Donaldson, later known as Nancy Maria Johnson, was born in New York. She is known for patenting the hand-cranked ice cream freezer. Her birth marks the beginning of the life of an inventor who would revolutionize how ice cream was made and enjoyed.