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1930 |
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Band Gaps Related to Bragg Scattering (Brillouin) |
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1931 |
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Waveguides for Transmission of Electromagnetic Waves |
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Band Theory of Semiconductors (Wilson) |
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1933 |
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Noise Studies in Transatlantic Radio Circuits Leads to Discovery of Galactic Radio Noise; Beginning of Radio Astronomy |
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First Transmission of Stereophonic Sound Over Phone Lines |
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1934 - 1943 |
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Pioneering Studies of Collective Phenomena in Plasmas & Electron Beams which Affect Power Output, Noise & Frequency Response of Vacuum Tubes |
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1934 |
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High Speed Motion Picture Camera |
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1936 |
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Speech Synthesis Machine |
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Schottky Diode Theory (Schottky & Mott) |
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Mervin Kelly Forms Solid-State Physics Group at Bell Labs; W. Shockley Hired |
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1937 |
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First Electrical Digital Computer: Made of Telephone Switches & Relays |
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Nobel Prize in Physics to C. Davisson & Sir G. Thomson for their Experimental Discovery of the Diffraction of Electrons by Crystals |
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1938 |
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Radio Altimeter |
