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  2. Travel alarm clock - Wikipedia

    en.wikipedia.org/wiki/Travel_alarm_clock

    The best-known wristband-type travel alarm clock models were Jaeger-LeCoultre's Memovox in 1950 and Pierce's Duofon in 1955. [8] While the dwellings adapted to the contemporary taste of the society, the technology remained the same for a long time. Only with electronics did the construction of travel alarm clock mechanisms change. The quartz ...

  3. The best sunrise alarm clocks of 2025 - AOL

    www.aol.com/lifestyle/best-sunrise-alarm-clocks...

    Best sunrise alarm clock Philips SmartSleep Sleep and Wake-Up Light. $180 at Amazon. Best app-controlled Hatch Restore 2 Sunrise Alarm Clock. More options. $170 at Amazon $170 at Target.

  4. Nuclear clock - Wikipedia

    en.wikipedia.org/wiki/Nuclear_clock

    Such a clock is expected to be more accurate than the best current atomic clocks by a factor of about 10, with an achievable accuracy approaching the 10 −19 level. [2] The only nuclear state suitable for the development of a nuclear clock using existing technology is thorium-229m, an isomer of thorium-229 and the lowest-energy nuclear isomer ...

  5. List of atomic clocks - Wikipedia

    en.wikipedia.org/wiki/List_of_atomic_clocks

    18 cesium atomic clocks and 4 hydrogen maser clocks Cs, H National Institute of Information and Communications Technology; Koganei, ...

  6. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    The development of atomic clocks has led to many scientific and technological advances such as precise global and regional navigation satellite systems, and applications in the Internet, which depend critically on frequency and time standards. Atomic clocks are installed at sites of time signal radio transmitters. [113]

  7. Kienzle Uhren - Wikipedia

    en.wikipedia.org/wiki/Kienzle_Uhren

    In the following years, Kienzle was the first company to present a quartz travel alarm clock. [7] In 1986, Kienzle developed the first solar watch with light conditions and a polycrystalline solar element. In the early 1990s, Kienzle developed the most water-resistant watch in the world which was resistant up to 12,000 metres.

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