Assertion: atomic clock | /r/HasProperty | invented at nist
Facets:
value: in 1949
type: TEMPORAL
Source sentences:
text: The atomic clock was invented at NIST in 1949 (then the National Bureau of Standards), and atomic clocks quickly became more accurate than any other timekeeping technologies.
text: The atomic clock was invented at NIST in 1949 (then the National Bureau of Standards), and atomic clocks quickly became more accurate than any other timekeeping technologies.