22 jarduera By JonGo22 3500 BCE obelish 1986 BCE Water clock 1500 BCE Sundial 499 Candle clock 1000 Mechanical clock Was invented in China, was invented by Su Sung, and it couldn't measure minutes because it only had an hour hand 1248 Sundglas 1399 Harrison timepiece 1500 Pondulm clock 1749 Digital clock 1950 Atomic clock