Who owns a company that manufactures frozen dessert machines, like soft serve machines, shake machines, slush machines, and batch freezers that is most known for being the soft serve machine used by a chain of soft serve ice cream and fast-food restaurants owned by International Dairy Queen, Inc?
Electro Freeze:  It is most known for being the soft serve machine used by Dairy Queen, as well as many other Soft Serve Ice Cream establishments.
i don't know