Atomichron
From Infogalactic: the planetary knowledge core
The Atomichron was the world's first commercial atomic clock, built by the National Company, Inc of Malden, Massachusetts. It was also the first self-contained portable atomic clock and was a caesium standard clock. More than 50 clocks with the trademarked Atomichron name were produced.[1][2][3][4]
References
See also
External links
- A Brief History of the National Company, Inc
- Atomichron: The Atomic Clock from Concept to Commercial Product
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