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Texas Instruments Designs the Regency TR-1, the First Commercial Transistor Radio, and the First Widely Sold Transistorized Product
Regency TR-1 Transistor Radio Facts and Figures
TR-1 The World's First Transistor Radio – Inside the Collection
Texas Instruments Designs the Regency TR-1, the First Commercial Transistor Radio, and the First Widely Sold Transistorized Product : History of Information
Texas Instruments - Wikipedia
What year was the transistor radio made? - Quora
Regency TR-1 Transistor Radio Facts and Figures
History of Transistors
Regency TR-1 Transistor Radio Facts and Figures
TI announces 1st transistor radio, October 18, 1954 - EDN