<P> The first patent for a rotary dial was granted to Almon Brown Strowger ( November 29 , 1892 ) as U.S. Patent 486,909 , but the commonly known form with holes in the finger wheel was not introduced until ca . 1904 . While used in telephone systems of the independent telephone companies , rotary dial service in the Bell System in the United States was not common until the introduction of the Western Electric model 50AL in 1919 . </P>
<P> The first patent for a rotary dial was granted to Almon Brown Strowger ( November 29 , 1892 ) as U.S. Patent 486,909 , but the commonly known form with holes in the finger wheel was not introduced until ca . 1904 . While used in telephone systems of the independent telephone companies , rotary dial service in the Bell System in the United States was not common until the introduction of the Western Electric model 50AL in 1919 . </P>
when did the first rotary phone come out
when did the first rotary phone come out
ca . 1904
ca . 1904