Otto Zobel invents m-derived filters
Otto Zobel invents m-derived filters
After acquiring Puerto Rican and Cuban telephone companies, the Behn brothers found ITT
After acquiring Puerto Rican and Cuban telephone companies, the Behn brothers found ITT
Dial phones spread to major cities
Dial phones spread to major cities
Type C carrier system deployed
Type C carrier system deployed
France creates PTT Administration
France creates PTT Administration
AT&T sells European subsidiaries to ITT
AT&T sells European subsidiaries to ITT
Giles Gilbert Scott designs the red telephone box (K2 kiosk) for GPO
Giles Gilbert Scott designs the red telephone box (K2 kiosk) for GPO
Bell Labs founded, in NYC
Bell Labs founded, in NYC
Automatic Electric acquires American Electric and Monarch Telephone
Automatic Electric acquires American Electric and Monarch Telephone
Davisson–Germer experiment confirms wave particle duality of matter
Davisson–Germer experiment confirms wave particle duality of matter
First long-distance video transmission over copper (with Herbert Hoover)
First long-distance video transmission over copper (with Herbert Hoover)
First transatlantic phone calls, using radio signals
First transatlantic phone calls, using radio signals
Black invents the negative feedback amplifier
Black invents the negative feedback amplifier
Hartley formulates Hartley's law
Hartley formulates Hartley's law
Nyquist and Johnson explain thermal noise in conductors
Nyquist and Johnson explain thermal noise in conductors
A Desert Span, Building Trunk Telephone Lines (AT&T)
Video: A Desert Span, Building Trunk Telephone Lines (AT&T)
The Tele Skater Girls
Video: The Tele Skater Girls
The U.S. has most of the world's telephones
The U.S. has most of the world's telephones
Henry Dreyfuss opens his industrial design firm
Henry Dreyfuss opens his industrial design firm
Sallie Mead becomes first woman to hold a patent at AT&T
Sallie Mead becomes first woman to hold a patent at AT&T
Coaxial cable patented by Espenschied and Affel
Coaxial cable patented by Espenschied and Affel
