Brown profs swap bar magnet for Bell's horseshoe magnet, enabling butterstamp telephones
Brown profs swap bar magnet for Bell's horseshoe magnet, enabling butterstamp telephones
De Forest Audion triode invented
De Forest Audion triode invented
Vacuum tube repeater demonstrated
Vacuum tube repeater demonstrated
Arnold perfects the vacuum-tube telephone amplifier
Arnold perfects the vacuum-tube telephone amplifier
Otto Zobel invents m-derived filters
Otto Zobel invents m-derived filters
Black invents the negative feedback amplifier
Black invents the negative feedback amplifier
Anti-sidetone circuit developed
Anti-sidetone circuit developed
Video: A Modern Aladdin's Lamp, About Vacuum Tubes (Western Electric)
Video: A Modern Aladdin's Lamp, About Vacuum Tubes (Western Electric)
Transistor invented at Bell Labs
Transistor invented at Bell Labs
Video: Bottle of Magic (The Vacuum Tube)
Video: Bottle of Magic (The Vacuum Tube)
Video: The Transistor (Bell System)
Video: The Transistor (Bell System)
Transistors first used in telephone equipment
Transistors first used in telephone equipment
Video: The Bell Solar Battery
Video: The Bell Solar Battery
Improved echo suppressors deployed
Improved echo suppressors deployed
Video: Genesis of the Transistor (Bell Labs)
Video: Genesis of the Transistor (Bell Labs)
Lucky invents the adaptive equalizer
Lucky invents the adaptive equalizer
Boyle and Smith invent the charge-coupled device, a chip that transforms light into electrical info
Boyle and Smith invent the charge-coupled device, a chip that transforms light into electrical info
Video: Inventing the Negative Feedback Amplifier (AT&T)
Video: Inventing the Negative Feedback Amplifier (AT&T)
Video: Inventing the Laser (Bell Labs)
Video: Inventing the Laser (Bell Labs)
