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Jointly produced by Texas Instruments and TV accessory manufacturer IDEA (Industrial Development Engineering Associates) Corp, the TR-1 was the first
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TI announces 1st transistor radio, October 18, 1954 - EDN
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Texas Instruments Designs the Regency TR-1, the First Commercial Transistor Radio, and the First Widely Sold Transistorized Product : History of Information
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Transistor Radio