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1940s - 1960s |
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Electrical & Mechanical Properties of Crystalline Polymers |
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1940 |
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First Commercial Use of Polyethylene as an Insulator |
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1941 |
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Discovery of Photovoltaic Effect in Silicon P-N Junction: First Rudimentary Solar Cell |
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1942 |
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Horn Reflector Antenna |
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1946 |
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First Fully Electronic Digital Computer: The ENIAC (University of Pennsylvania) |
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Traveling Wave Amplifier Concept (Kompfner) |
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1947 |
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Cellular Radio Concept |
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Supermalloy (Molybdenum/Nickel/Iron) for Transformers at Audio & Carrier Frequencies |
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First Experimental Microwave Radio-Relay Transmission System (TDX): Connects New York to Boston |
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Demonstration of Digital Voice Communications (Pulse Code Modulation) |
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Minority Carrier Injection |
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Investigation of Surface States on Semiconductors |
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Point Contact Transistor |
