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Dan Cho Guest Contributor

  • Space Tracker

    The earliest satellite watchers’ ideas led to GPS.

  • Heart Restart

    Bernard Lown’s defibrillator has jolted patients back to life for more than 40 years.

  • A Good Start

    Charles Kettering’s electric starter eliminated a major driving annoyance.

  • Picking the President

    The Univac introduced the public to computers with its 1952 election night forecast.

  • Radio Flyer

    Reginald Denny made movies with Alfred Hitchcock and Abbott and Costello-and he built the U.S. Army’s first robot plane.

  • Prescient Porsche

    Ferdinand Porsche demonstrated gas-electric hybrids at the turn of the 20th century.

  • Cut by Numbers

    John Parsons paved the way for computer-aided manufacturing.

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