Q: Is a rotary dial a component of a telephone or a telephone switchboard that implements a signaling technology in telecommunications known as pulse dialing? ¶
Q: Was a rotary dial gradually supplanted by dual-tone multi-frequency push-button dialing, first introduced to the public at the 1962 World's Fair under the trade name "Touch-Tone"? ¶
A: Yes, Touch-tone technology primarily used a keypad in form of a rectangular array of push-buttons for dialing.
Q: Was a rotary dial granted to Almon Brown Strowger as U.S? ¶
A: Yes, Patent 486,909, but the commonly known form with holes in the finger wheel was not introduced until ca.