The mixer with rotating parts was patented in 1856 by Baltimore, Maryland, tinner Ralph Collier. U.S. Patent 16,267 This was followed by E.P. Griffith's whisk patented in England in 1857. Another hand-turned rotary egg beater was patented by J.F. and E.P. Monroe in 1859 in the US.
The arrival of the first mixer with electric motor did change the direction of things for other mixer companies, and it was invented by American Rufus Eastman in 1885.