Loudspeaker

Timeline created by cortk
  • Period: to

    To the first loudspeaker

  • Johann Philipp Reis - Electric Loudspeaker developed

    Johann Philipp Reis - Electric Loudspeaker developed
    Loudspeaker was added to the world's first telephone, called the Reis telephone.
  • Alexander Graham Bell - Improved loudspeaker

    Alexander Graham Bell - Improved loudspeaker
  • Improved on by Ernst Siemens - German patent gotten

    Improved on by Ernst Siemens - German patent gotten
    German inventor and industrialist. Founder of Siemens telecommunications company.
    The patent received was for an 'electromechanical "dynamic" or moving-coil transducer".
  • Oliver Lodge - Moving Coil (Dynamic) Driver Speakers

    Oliver Lodge - Moving Coil (Dynamic) Driver Speakers
  • Peter L. Jensen, Edwin Pridham - First Practical application of Dynamic Driver Speakers

    Peter L. Jensen, Edwin Pridham - First Practical application of Dynamic Driver Speakers
    Moving-coil loudspeaker
  • Dynamic Driver Speakers patented by Chester W. Rice, Edward W. Kellogg

    First prototype in 1921. Patent filed April 1st, 1925.