In 1790 – John Frederic Daniell was born. He would grow up to invent the Daniell cell, a battery that supplied an even current during continuous operation, thus making battery power practical.
In 1889 – Almon B. Strowger of Kansas City filed his patent for the first automatic telephone exchange.
In 1923 – Inventor Lee De Forest demonstrated The Phonofilm for the press. It was the first motion picture with a sound-on-film track.
In 1989 – Tim Berners-Lee wrote a paper proposing an “information management” system that became the foundation of the World Wide Web. He called it the Mesh at the time.