Clocks

  • 200 BCE

    Water Powered Escapement Mechanism Clock

  • Feb 1, 900

    Mercury Powered Escapement Mechanism Clock

  • Feb 1, 1000

    Water Clock using gears

  • Jan 1, 1206

    Candle Clock

  • Feb 1, 1300

    First Mechanical Clocks

  • First Pocket Watches

  • Pendulum Clock

  • Quartz Oscillators Invented

  • Atomic Clock

  • Quartz Clocks Become Dominant