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Oct 5, 1504
wrist watch
the first portable (but not very accurate) timepiece was invented in Nuremberg. -
Oct 5, 1577
minute hand
Jost Burgi invented the minute hand -
pendulum
the pendulum was invented by Christian Huygens, making clocks more accurate. -
standard tme
Sir Sanford Fleming invented standard time -
quartz
Canadian-born Warren Marrison, a telecommunications engineer, was searching for reliable frequency standards
