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On this day in 1948, two engineers from DuMont Laboratories received a patent for their cathode-ray tube amusement device.
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By iHeartPodcasts and HowStuffWorksOn this day in 1948, two engineers from DuMont Laboratories received a patent for their cathode-ray tube amusement device.
Learn more about your ad-choices at https://www.iheartpodcastnetwork.com
See omnystudio.com/listener for privacy information.