In 1843, Nancy Johnson received the first U.S. patent for this.
- An automatic milking machine
- An ice-cream freezer
- A sewing machine
- A steam powered cider-press
In 1843, Nancy Johnson received the first U.S. patent for this.
The ice-cream freezer. The hand-cranked freezer that used an ice and salt mixture to cool the cream and fruit mixture established the basic method of making ice cream still in use.