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  2. Tappan (brand) - Wikipedia

    en.wikipedia.org/wiki/Tappan_(brand)

    Tappan is a brand of appliances, named after company founder W. J. Tappan. [1] [2]Tappan claimed several innovations: 1930s all-porcelain range available in various colors [2]

  3. Mengenlehreuhr - Wikipedia

    en.wikipedia.org/wiki/Mengenlehreuhr

    The clock at its original location in May 1979, displaying 17:54 (5:54pm). The Mengenlehreuhr ( German for " Set Theory Clock") or Berlin-Uhr (" Berlin Clock") is the first public clock in the world that tells the time by means of illuminated, coloured fields, for which it entered the Guinness Book of Records upon its installation on 17 June 1975.

  4. Rubidium standard - Wikipedia

    en.wikipedia.org/wiki/Rubidium_standard

    Commercial rubidium clocks are less accurate than caesium atomic clocks, which serve as primary frequency standards, so a rubidium clock is usually used as a secondary frequency standard. Commercial rubidium frequency standards operate by disciplining a crystal oscillator to the rubidium hyperfine transition of 6.8 GHz ( 6 834 682 610 .904 Hz ).

  5. TiktoClock - Wikipedia

    en.wikipedia.org/wiki/TiktoClock

    TiktoClock is a Philippine television variety show broadcast by GMA Network.Directed by Louie Ignacio, it was originally hosted by Kim Atienza, Pokwang and Rabiya Mateo.It premiered on July 25, 2022 on the network's daytime line up.